1
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Liu L, Malagu K, Haughan AF, Khetarpal V, Stott AJ, Esmieu W, Vater HD, Webster SJ, Van de Poël AJ, Clissold C, Cosgrove B, Sutton B, Spencer JA, Breccia P, Gancia E, Bonomo S, Ladduwahetty T, Lazari O, Patel H, Atton HC, Clifton S, Mota DM, Magnani D, O'Neill A, Stebbeds M, Macabuag N, Todd D, Herva ME, Mitchell P, Visser M, Compte Sancerni S, Grand Moursel L, da Silva M, Kritikou E, Heikkinen TT, Bolkvadze T, Fodale V, Spadafora D, Daldin M, Bresciani A, Mangette JE, Doherty EM, Lee MR, Herbst T, Monteagudo E, Macdonald D, Plotnikov NV, Chambers M, McAllister G, Muňoz-Sanjuan I, Dominguez C. Identification and Optimization of RNA-Splicing Modulators as Huntingtin Protein-Lowering Agents for the Treatment of Huntington's Disease. J Med Chem 2023; 66:13205-13246. [PMID: 37712656 DOI: 10.1021/acs.jmedchem.3c01173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
Huntington's disease (HD) is caused by an expanded CAG trinucleotide repeat in exon 1 of the huntingtin (HTT) gene. We report the design of a series of HTT pre-mRNA splicing modulators that lower huntingtin (HTT) protein, including the toxic mutant huntingtin (mHTT), by promoting insertion of a pseudoexon containing a premature termination codon at the exon 49-50 junction. The resulting transcript undergoes nonsense-mediated decay, leading to a reduction of HTT mRNA transcripts and protein levels. The starting benzamide core was modified to pyrazine amide and further optimized to give a potent, CNS-penetrant, and orally bioavailable HTT-splicing modulator 27. This compound reduced canonical splicing of the HTT RNA exon 49-50 and demonstrated significant HTT-lowering in both human HD stem cells and mouse BACHD models. Compound 27 is a structurally diverse HTT-splicing modulator that may help understand the mechanism of adverse effects such as peripheral neuropathy associated with branaplam.
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Affiliation(s)
- Longbin Liu
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Karine Malagu
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Alan F Haughan
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Vinod Khetarpal
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Andrew J Stott
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - William Esmieu
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Huw D Vater
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Stephen J Webster
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Amanda J Van de Poël
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Cole Clissold
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Brett Cosgrove
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Benjamin Sutton
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Jonathan A Spencer
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Perla Breccia
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Emanuela Gancia
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Silvia Bonomo
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Tammy Ladduwahetty
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Ovadia Lazari
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Hiral Patel
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Helen C Atton
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Steve Clifton
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Daniel M Mota
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Dario Magnani
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Amy O'Neill
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Marta Stebbeds
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Natsuko Macabuag
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Daniel Todd
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Maria E Herva
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Philip Mitchell
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - Mijke Visser
- Charles River, Darwinweg 24, 2333 CR Leiden, The Netherlands
| | | | | | - Marta da Silva
- Charles River, Darwinweg 24, 2333 CR Leiden, The Netherlands
| | - Eva Kritikou
- Charles River, Darwinweg 24, 2333 CR Leiden, The Netherlands
| | | | | | | | | | | | | | | | - Elizabeth M Doherty
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Matthew R Lee
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Todd Herbst
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Edith Monteagudo
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Douglas Macdonald
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Nikolay V Plotnikov
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Mark Chambers
- Discovery from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K
| | - George McAllister
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Ignacio Muňoz-Sanjuan
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Celia Dominguez
- CHDI Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
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2
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Liu L, Johnson PD, Prime ME, Khetarpal V, Brown CJ, Anzillotti L, Bertoglio D, Chen X, Coe S, Davis R, Dickie AP, Esposito S, Gadouleau E, Giles PR, Greenaway C, Haber J, Halldin C, Haller S, Hayes S, Herbst T, Herrmann F, Heßmann M, Hsai MM, Khani Y, Kotey A, Lembo A, Mangette JE, Marriner GA, Marston RW, Mills MR, Monteagudo E, Forsberg-Morén A, Nag S, Orsatti L, Sandiego C, Schaertl S, Sproston J, Staelens S, Tookey J, Turner PA, Vecchi A, Veneziano M, Muñoz-Sanjuan I, Bard J, Dominguez C. Design and Evaluation of [ 18F]CHDI-650 as a Positron Emission Tomography Ligand to Image Mutant Huntingtin Aggregates. J Med Chem 2023; 66:641-656. [PMID: 36548390 DOI: 10.1021/acs.jmedchem.2c01585] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Therapeutic interventions are being developed for Huntington's disease (HD), a hallmark of which is mutant huntingtin protein (mHTT) aggregates. Following the advancement to human testing of two [11C]-PET ligands for aggregated mHTT, attributes for further optimization were identified. We replaced the pyridazinone ring of CHDI-180 with a pyrimidine ring and minimized off-target binding using brain homogenate derived from Alzheimer's disease patients. The major in vivo metabolic pathway via aldehyde oxidase was blocked with a 2-methyl group on the pyrimidine ring. A strategically placed ring-nitrogen on the benzoxazole core ensured high free fraction in the brain without introducing efflux. Replacing a methoxy pendant with a fluoro-ethoxy group and introducing deuterium atoms suppressed oxidative defluorination and accumulation of [18F]-signal in bones. The resulting PET ligand, CHDI-650, shows a rapid brain uptake and washout profile in non-human primates and is now being advanced to human testing.
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Affiliation(s)
- Longbin Liu
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Peter D Johnson
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Michael E Prime
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Vinod Khetarpal
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Christopher J Brown
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Luca Anzillotti
- Experimental Pharmacology Department, IRBM S.p.A., Via Pontina km 30,600, Pomezia, Roma 00071, Italy
| | - Daniele Bertoglio
- Molecular Imaging Center Antwerp (MICA), University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Xuemei Chen
- Curia Global, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Samuel Coe
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Randall Davis
- Curia Global, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Anthony P Dickie
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Simone Esposito
- Experimental Pharmacology Department, IRBM S.p.A., Via Pontina km 30,600, Pomezia, Roma 00071, Italy
| | - Elise Gadouleau
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Paul R Giles
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Catherine Greenaway
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - James Haber
- Curia Global, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Christer Halldin
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - Scott Haller
- Charles River Laboratories, 54943 North Main Street, Mattawan, Michigan 49071, United States
| | - Sarah Hayes
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Todd Herbst
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Frank Herrmann
- Evotec SE, Manfred Eigen Campus, Essener Bogen 7, Hamburg 22419, Germany
| | - Manuela Heßmann
- Evotec SE, Manfred Eigen Campus, Essener Bogen 7, Hamburg 22419, Germany
| | - Ming Min Hsai
- Curia Global, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Yaser Khani
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - Adrian Kotey
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Angelo Lembo
- Experimental Pharmacology Department, IRBM S.p.A., Via Pontina km 30,600, Pomezia, Roma 00071, Italy
| | - John E Mangette
- Curia Global, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Gwendolyn A Marriner
- Charles River Laboratories, 54943 North Main Street, Mattawan, Michigan 49071, United States
| | - Richard W Marston
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Matthew R Mills
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Edith Monteagudo
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Anton Forsberg-Morén
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - Sangram Nag
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - Laura Orsatti
- Experimental Pharmacology Department, IRBM S.p.A., Via Pontina km 30,600, Pomezia, Roma 00071, Italy
| | - Christine Sandiego
- Invicro, 60 Temple St, Ste 8A, New Haven, Connecticut 06510, United States
| | - Sabine Schaertl
- Evotec SE, Manfred Eigen Campus, Essener Bogen 7, Hamburg 22419, Germany
| | - Joanne Sproston
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Steven Staelens
- Molecular Imaging Center Antwerp (MICA), University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Jack Tookey
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Penelope A Turner
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Andrea Vecchi
- Experimental Pharmacology Department, IRBM S.p.A., Via Pontina km 30,600, Pomezia, Roma 00071, Italy
| | - Maria Veneziano
- Experimental Pharmacology Department, IRBM S.p.A., Via Pontina km 30,600, Pomezia, Roma 00071, Italy
| | - Ignacio Muñoz-Sanjuan
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Jonathan Bard
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Celia Dominguez
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
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3
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Macabuag N, Esmieu W, Breccia P, Jarvis R, Blackaby W, Lazari O, Urbonas L, Eznarriaga M, Williams R, Strijbosch A, Van de Bospoort R, Matthews K, Clissold C, Ladduwahetty T, Vater H, Heaphy P, Stafford DG, Wang HJ, Mangette JE, McAllister G, Beaumont V, Vogt TF, Wilkinson HA, Doherty EM, Dominguez C. Developing HDAC4-Selective Protein Degraders To Investigate the Role of HDAC4 in Huntington's Disease Pathology. J Med Chem 2022; 65:12445-12459. [PMID: 36098485 PMCID: PMC9512014 DOI: 10.1021/acs.jmedchem.2c01149] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Indexed: 11/30/2022]
Abstract
Huntington's disease (HD) is a lethal autosomal dominant neurodegenerative disorder resulting from a CAG repeat expansion in the huntingtin (HTT) gene. The product of translation of this gene is a highly aggregation-prone protein containing a polyglutamine tract >35 repeats (mHTT) that has been shown to colocalize with histone deacetylase 4 (HDAC4) in cytoplasmic inclusions in HD mouse models. Genetic reduction of HDAC4 in an HD mouse model resulted in delayed aggregation of mHTT, along with amelioration of neurological phenotypes and extended lifespan. To further investigate the role of HDAC4 in cellular models of HD, we have developed bifunctional degraders of the protein and report the first potent and selective degraders of HDAC4 that show an effect in multiple cell lines, including HD mouse model-derived cortical neurons. These degraders act via the ubiquitin-proteasomal pathway and selectively degrade HDAC4 over other class IIa HDAC isoforms (HDAC5, HDAC7, and HDAC9).
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Affiliation(s)
- Natsuko Macabuag
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - William Esmieu
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Perla Breccia
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Rebecca Jarvis
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Wesley Blackaby
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Ovadia Lazari
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Liudvikas Urbonas
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Maria Eznarriaga
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Rachel Williams
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | | | | | - Kim Matthews
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Cole Clissold
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Tammy Ladduwahetty
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Huw Vater
- Discovery
from Charles River, Charles River, Chesterford Research Park, Saffron Walden CB10 1XL, U.K.
| | - Patrick Heaphy
- Curia, The Conventus Building, 1001 Main
Street, Buffalo, New York 14203, United States
| | - Douglas G. Stafford
- Curia, The Conventus Building, 1001 Main
Street, Buffalo, New York 14203, United States
| | - Hong-Jun Wang
- Curia, The Conventus Building, 1001 Main
Street, Buffalo, New York 14203, United States
| | - John E. Mangette
- Curia, The Conventus Building, 1001 Main
Street, Buffalo, New York 14203, United States
| | - George McAllister
- CHDI
Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Vahri Beaumont
- CHDI
Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Thomas F. Vogt
- CHDI
Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Hilary A. Wilkinson
- CHDI
Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Elizabeth M. Doherty
- CHDI
Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
| | - Celia Dominguez
- CHDI
Management/CHDI Foundation, 6080 Center Drive, Los Angeles, California 90045, United States
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4
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Liu L, Johnson PD, Prime ME, Khetarpal V, Lee MR, Brown CJ, Chen X, Clark-Frew D, Coe S, Conlon M, Davis R, Ensor S, Esposito S, Moren AF, Gai X, Green S, Greenaway C, Haber J, Halldin C, Hayes S, Herbst T, Herrmann F, Heßmann M, Hsai MM, Kotey A, Mangette JE, Mills MR, Monteagudo E, Nag S, Nibbio M, Orsatti L, Schaertl S, Scheich C, Sproston J, Stepanov V, Varnäs K, Varrone A, Wityak J, Mrzljak L, Munoz-Sanjuan I, Bard JA, Dominguez C. [ 11C]CHDI-626, a PET Tracer Candidate for Imaging Mutant Huntingtin Aggregates with Reduced Binding to AD Pathological Proteins. J Med Chem 2021; 64:12003-12021. [PMID: 34351166 DOI: 10.1021/acs.jmedchem.1c00667] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The expanded polyglutamine-containing mutant huntingtin (mHTT) protein is implicated in neuronal degeneration of medium spiny neurons in Huntington's disease (HD) for which multiple therapeutic approaches are currently being evaluated to eliminate or reduce mHTT. Development of effective and orthogonal biomarkers will ensure accurate assessment of the safety and efficacy of pharmacologic interventions. We have identified and optimized a class of ligands that bind to oligomerized/aggregated mHTT, which is a hallmark in the HD postmortem brain. These ligands are potentially useful imaging biomarkers for HD therapeutic development in both preclinical and clinical settings. We describe here the optimization of the benzo[4,5]imidazo[1,2-a]pyrimidine series that show selective binding to mHTT aggregates over Aβ- and/or tau-aggregates associated with Alzheimer's disease pathology. Compound [11C]-2 was selected as a clinical candidate based on its high free fraction in the brain, specific binding in the HD mouse model, and rapid brain uptake/washout in nonhuman primate positron emission tomography imaging studies.
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Affiliation(s)
- Longbin Liu
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Peter D Johnson
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Michael E Prime
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Vinod Khetarpal
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Matthew R Lee
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Christopher J Brown
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Xuemei Chen
- Albany Molecular Research, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Daniel Clark-Frew
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Samuel Coe
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Mike Conlon
- Albany Molecular Research, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Randall Davis
- Albany Molecular Research, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Samantha Ensor
- Albany Molecular Research, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Simone Esposito
- IRBM, IRBM Science Park S.p.A., Via Pontina Km 30,600, Pomezia, Rome 00071, Italy
| | - Anton Forsberg Moren
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - Xinjie Gai
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Samantha Green
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Catherine Greenaway
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - James Haber
- Albany Molecular Research, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Christer Halldin
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - Sarah Hayes
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Todd Herbst
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Frank Herrmann
- Evotec SE, Manfred Eigen Campus, Essener Bogen 7, Hamburg 22419, Germany
| | - Manuela Heßmann
- Evotec SE, Manfred Eigen Campus, Essener Bogen 7, Hamburg 22419, Germany
| | - Ming Min Hsai
- Albany Molecular Research, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Adrian Kotey
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - John E Mangette
- Albany Molecular Research, Inc., 1001 Main Street, Buffalo, New York 14203, United States
| | - Matthew R Mills
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Edith Monteagudo
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Sangram Nag
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - Martina Nibbio
- IRBM, IRBM Science Park S.p.A., Via Pontina Km 30,600, Pomezia, Rome 00071, Italy
| | - Laura Orsatti
- IRBM, IRBM Science Park S.p.A., Via Pontina Km 30,600, Pomezia, Rome 00071, Italy
| | - Sabine Schaertl
- Evotec SE, Manfred Eigen Campus, Essener Bogen 7, Hamburg 22419, Germany
| | - Christoph Scheich
- Evotec SE, Manfred Eigen Campus, Essener Bogen 7, Hamburg 22419, Germany
| | - Joanne Sproston
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Vladimir Stepanov
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - Katarina Varnäs
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - Andrea Varrone
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, Stockholm S-17176, Sweden
| | - John Wityak
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Ladislav Mrzljak
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Ignacio Munoz-Sanjuan
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Jonathan A Bard
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Celia Dominguez
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
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5
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Liu L, Prime ME, Lee MR, Khetarpal V, Brown CJ, Johnson PD, Miranda-Azpiazu P, Chen X, Clark-Frew D, Coe S, Davis R, Dickie A, Ebneth A, Esposito S, Gadouleau E, Gai X, Galan S, Green S, Greenaway C, Giles P, Halldin C, Hayes S, Herbst T, Herrmann F, Heßmann M, Jia Z, Kiselyov A, Kotey A, Krulle T, Mangette JE, Marston RW, Menta S, Mills MR, Monteagudo E, Nag S, Nibbio M, Orsatti L, Schaertl S, Scheich C, Sproston J, Stepanov V, Svedberg M, Takano A, Taylor M, Thomas W, Toth M, Vaidya D, Vanräs K, Weddell D, Wigginton I, Wityak J, Mrzljak L, Munoz-Sanjuan I, Bard JA, Dominguez C. Imaging Mutant Huntingtin Aggregates: Development of a Potential PET Ligand. J Med Chem 2020; 63:8608-8633. [PMID: 32662649 DOI: 10.1021/acs.jmedchem.0c00955] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Mutant huntingtin (mHTT) protein carrying the elongated N-terminal polyglutamine (polyQ) tract misfolds and forms protein aggregates characteristic of Huntington's disease (HD) pathology. A high-affinity ligand specific for mHTT aggregates could serve as a positron emission tomography (PET) imaging biomarker for HD therapeutic development and disease progression. To identify such compounds with binding affinity for polyQ aggregates, we embarked on systematic structural activity studies; lead optimization of aggregate-binding affinity, unbound fractions in brain, permeability, and low efflux culminated in the discovery of compound 1, which exhibited target engagement in autoradiography (ARG) studies in brain slices from HD mouse models and postmortem human HD samples. PET imaging studies with 11C-labeled 1 in both HD mice and WT nonhuman primates (NHPs) demonstrated that the right-hand-side labeled ligand [11C]-1R (CHDI-180R) is a suitable PET tracer for imaging of mHTT aggregates. [11C]-1R is now being advanced to human trials as a first-in-class HD PET radiotracer.
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Affiliation(s)
- Longbin Liu
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Michael E Prime
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Matt R Lee
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Vinod Khetarpal
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Christopher J Brown
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Peter D Johnson
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Patricia Miranda-Azpiazu
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Xuemei Chen
- Albany Molecular Research, Inc., 1001 Main St., Buffalo, New York 14203, United States
| | - Daniel Clark-Frew
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Samuel Coe
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Randall Davis
- Albany Molecular Research, Inc., 1001 Main St., Buffalo, New York 14203, United States
| | - Anthony Dickie
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Andreas Ebneth
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Simone Esposito
- IRBM, IRBM Science Park S.p.A., Via Pontina Km 30, 600, 00071 Pomezia (RM), Italy
| | - Elise Gadouleau
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Xinjie Gai
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Sebastien Galan
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Samantha Green
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Catherine Greenaway
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Paul Giles
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Christer Halldin
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Sarah Hayes
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Todd Herbst
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Frank Herrmann
- Evotec AG, Manfred Eigen Campus, Essener Bogen 7, 22419 Hamburg, Germany
| | - Manuela Heßmann
- Evotec AG, Manfred Eigen Campus, Essener Bogen 7, 22419 Hamburg, Germany
| | - Zhisheng Jia
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Alexander Kiselyov
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Adrian Kotey
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Thomas Krulle
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - John E Mangette
- Albany Molecular Research, Inc., 1001 Main St., Buffalo, New York 14203, United States
| | - Richard W Marston
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Sergio Menta
- IRBM, IRBM Science Park S.p.A., Via Pontina Km 30, 600, 00071 Pomezia (RM), Italy
| | - Matthew R Mills
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Edith Monteagudo
- IRBM, IRBM Science Park S.p.A., Via Pontina Km 30, 600, 00071 Pomezia (RM), Italy
| | - Sangram Nag
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Martina Nibbio
- IRBM, IRBM Science Park S.p.A., Via Pontina Km 30, 600, 00071 Pomezia (RM), Italy
| | - Laura Orsatti
- IRBM, IRBM Science Park S.p.A., Via Pontina Km 30, 600, 00071 Pomezia (RM), Italy
| | - Sabine Schaertl
- Evotec AG, Manfred Eigen Campus, Essener Bogen 7, 22419 Hamburg, Germany
| | - Christoph Scheich
- Evotec AG, Manfred Eigen Campus, Essener Bogen 7, 22419 Hamburg, Germany
| | - Joanne Sproston
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Vladimir Stepanov
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Marie Svedberg
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Akihiro Takano
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Malcolm Taylor
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Wayne Thomas
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Miklós Toth
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Darshan Vaidya
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Katarina Vanräs
- Department of Clinical Neuroscience, Centre for Psychiatric Research, Karolinska Hospital, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Derek Weddell
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - Ian Wigginton
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon OX14 4RZ, U.K
| | - John Wityak
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Ladislav Mrzljak
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Ignacio Munoz-Sanjuan
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Jonathan A Bard
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
| | - Celia Dominguez
- CHDI Management/CHDI Foundation, 6080 Center Drive, Suite 700, Los Angeles, California 90045, United States
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6
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Huang Z, Williams RB, Martin SM, Lawrence JA, Norman VL, O'Neil-Johnson M, Harding J, Mangette JE, Liu S, Guzzo PR, Starks CM, Eldridge GR. Bifidenone: Structure-Activity Relationship and Advanced Preclinical Candidate. J Med Chem 2018; 61:6736-6747. [PMID: 29995409 DOI: 10.1021/acs.jmedchem.7b01644] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bifidenone is a novel natural tubulin polymerization inhibitor that exhibits antiproliferative activity against a range of human cancer cell lines, making it an attractive candidate for development. A synthetic route was previously developed to alleviate supply constraints arising from its isolation in microgram quantities from a Gabonese tree. Using that previously published route, we present here 42 analogues that were synthesized to examine the structure-activity relationship of bifidenone derivatives. In addition to in vitro cytotoxicity data, data from murine xenograft and pharmacokinetic studies were used to evaluate the analogues. Compounds 45b and 46b were found to demonstrate promising efficacy in murine xenograft experiments, and 46b had significantly more potent in vitro antiproliferative activity against taxane-resistant cell lines compared to that of paclitaxel.
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Affiliation(s)
- Zhongping Huang
- Albany Molecular Research Inc. , 1001 Main Street , Buffalo , New York 14203 , United States
| | - Russell B Williams
- Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive , St. Louis , Missouri 63114 , United States
| | - Steven M Martin
- Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive , St. Louis , Missouri 63114 , United States
| | - Julie A Lawrence
- Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive , St. Louis , Missouri 63114 , United States
| | - Vanessa L Norman
- Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive , St. Louis , Missouri 63114 , United States
| | - Mark O'Neil-Johnson
- Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive , St. Louis , Missouri 63114 , United States
| | - Jim Harding
- Albany Molecular Research Inc. , 1001 Main Street , Buffalo , New York 14203 , United States
| | - John E Mangette
- Albany Molecular Research Inc. , 1001 Main Street , Buffalo , New York 14203 , United States
| | - Shuang Liu
- Albany Molecular Research Inc. , 1001 Main Street , Buffalo , New York 14203 , United States
| | - Peter R Guzzo
- Albany Molecular Research Inc. , 1001 Main Street , Buffalo , New York 14203 , United States
| | - Courtney M Starks
- Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive , St. Louis , Missouri 63114 , United States
| | - Gary R Eldridge
- Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive , St. Louis , Missouri 63114 , United States
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Wang HJ, Camara F, Haber JC, Mangette JE. Synthesis of benzo[6,7][1,4]diazepino[1,2-b]indazol-7(6H)-ones and benzo[f]pyrazolo[1,5-a][1,4]diazepin-4-ones via CuI/l-proline catalyzed intramolecular N2-arylation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Johnson MR, Gauuan JF, Guo C, Guzzo PR, Le VD, Shenoy RA, Hamby J, Roark H, Stier M, Mangette JE. Synthesis and Characterization of Novel Bi- and Tricyclic α-Amino Acids. SYNTHETIC COMMUN 2011. [DOI: 10.1080/00397911.2010.515354] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wang HJ, Wang Y, Camara F, Paquette WD, Csakai AJ, Mangette JE. Facile synthesis of 6,12b-diaza-dibenzo[a,h]azulen-7-ones and benzo[f]pyrrolo[1,2-a][1,4]diazepin-4-ones via CuI/l-proline catalyzed intramolecular N-arylation. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.11.117] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Leites LA, Bukalov SS, Mangette JE, Schmedake TA, West R. Conformational polymorphism of solid tetramesityldisilene Mes2Si=SiMes2 (Raman, UV-vis, IR and fluorescence study). Spectrochim Acta A Mol Biomol Spectrosc 2003; 59:1975-1988. [PMID: 12788451 DOI: 10.1016/s1386-1425(03)00004-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Conformational polymorphism of solid tetramesityldisilene (1) has been studied by the methods of optical spectroscopy. The three known modifications of 1: orange unsolvated 1a and two 1:1 solvates with toluene (1b) and THF (1c) have been found to transform under specific conditions to a new, most thermodynamically stable polymorph, yellow unsolvated powder 1d. The latter has been characterized by the Raman, IR, UV-vis and fluorescence data. All forms of 1 exhibit Raman spectra differing in details, which reflect their different crystal and molecular structures. Unsolvated 1a and 1d differ significantly in electronic absorption and fluorescence emission. The yellow form 1d can be converted to the orange form 1a upon illumination with laser light in the region 514-457 nm. Similarity of the Raman and UV-vis spectra of 1d to those of the solutions of 1 provides some evidence for a quasi-trans conformation of 1d.
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Affiliation(s)
- L A Leites
- A.N. Nesmeyanov Institute of Organoelement Compounds, Scientific and Technical Center on Raman Spectroscopy, Russian Academy of Sciences, 28 Vavilova str., 119991 Moscow, Russia.
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Zimmerman HE, Kutateladze AG, Maekawa Y, Mangette JE. Excited State Reactivity as a Function of Diradical Structure. Evidence for Two Triplet Cyclopropyldicarbinyl Diradical Intermediates with Differing Reactivity. J Am Chem Soc 2002. [DOI: 10.1021/ja00100a073] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mangette JE, Powell DR, West R. Mechanistic investigation on the reactivity of the silicon-silicon double bond with epoxides. Reaction of tetramesityldisilene with cis- and trans-stilbene oxides. Organometallics 2002. [DOI: 10.1021/om00022a054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Mangette JE, Powell DR, West R. Thiadisilacyclopropanes: Stereospecific Formation from Disilenes and Solid State Structures. Organometallics 2002. [DOI: 10.1021/om00007a063] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Leites LA, Bukalov SS, Mangette JE, Schmedake TA, West R. Raman and UV-VIS study of the conformational polymorphism of solid tetramesityldisilene Mes2SiSiMes2. Mendeleev Communications 1998. [DOI: 10.1070/mc1998v008n02abeh000910] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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