1
|
Milewska KD, Malins LR. Synthesis of Amino Acid α-Thioethers and Late-Stage Incorporation into Peptides. Org Lett 2022; 24:3680-3685. [DOI: 10.1021/acs.orglett.2c01297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Karen D. Milewska
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Lara R. Malins
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| |
Collapse
|
2
|
Xu H, Nazli A, Zou C, Wang ZP, He Y. Bench-stable imine surrogates for the one-pot and catalytic asymmetric synthesis of α-amino esters/ketones. Chem Commun (Camb) 2020; 56:14243-14246. [PMID: 33118565 DOI: 10.1039/d0cc06055k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N,O-Bis(tert-butoxycarbonyl)hydroxylamines are readily accessible as imine surrogates, which are bench stable and could quantitatively generate the corresponding imines for in situ applications. An unpresented catalytic asymmetric method for the synthesis of α-amino esters and ketones from novel imine surrogates, N,O-bis(tert-butoxycarbonyl)hydroxylamines, as well as its preliminary mechanistic studies are reported. A variety of optically enriched products were obtained in excellent yields and enantioselectivities (up to 99% yield and >99% ee).
Collapse
Affiliation(s)
- Huacheng Xu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, P. R. China.
| | - Adila Nazli
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, P. R. China.
| | - Cheng Zou
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, P. R. China.
| | - Zhi-Peng Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, P. R. China.
| | - Yun He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, P. R. China.
| |
Collapse
|
3
|
Khan RKM, Zhao Y, Scully TD, Buchwald SL. Catalytic Arylhydroxylation of Dehydroalanine in Continuous Flow for Simple Access to Unnatural Amino Acids. Chemistry 2018; 24:15215-15218. [DOI: 10.1002/chem.201804094] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Indexed: 11/09/2022]
Affiliation(s)
- R. Kashif M. Khan
- Department of ChemistryMassachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Yang Zhao
- Department of ChemistryMassachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Tal D. Scully
- Department of ChemistryMassachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Stephen L. Buchwald
- Department of ChemistryMassachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA
| |
Collapse
|
4
|
Li J, Song X, Zhou S, Wang J, Liu H. Asymmetric Synthesis of Chiral α
-Substituted Mercaptoglycine Derivatives via α
-Sulfenylation of Ni(II) Complex of Glycine and S
-Substituted 4-Methylbenzenesulfonothioate. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201700137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jia Li
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 China
- University of Chinese Academy of Sciences; Beijing 100049 China
- School of Pharmacy; China Pharmaceutical University; Nanjing Jiangsu 210009 China
| | - Xiaohan Song
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Shengbin Zhou
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Jiang Wang
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Hong Liu
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 China
- University of Chinese Academy of Sciences; Beijing 100049 China
- School of Pharmacy; China Pharmaceutical University; Nanjing Jiangsu 210009 China
| |
Collapse
|
5
|
Ganesh Kumar M, Mali SM, Raja KMP, Gopi HN. Design of Stable β-Hairpin Mimetics through Backbone Disulfide Bonds. Org Lett 2014; 17:230-3. [DOI: 10.1021/ol503310r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mothukuri Ganesh Kumar
- Department
of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune 411008, India
| | - Sachitanand M. Mali
- Department
of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune 411008, India
| | - K. Muruga Poopathi Raja
- Department
of Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India
| | - Hosahudya N. Gopi
- Department
of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune 411008, India
| |
Collapse
|
6
|
Roche SP, Samanta SS, Gosselin MMJ. Autocatalytic one pot orchestration for the synthesis of α-arylated, α-amino esters. Chem Commun (Camb) 2014; 50:2632-4. [DOI: 10.1039/c3cc48884e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
α-Arylated, α-amino esters are synthesized in one pot, using an AcOH/AcCl autocatalytic system, which promotes simultaneous dehydration–activation before Friedel–Crafts functionalization.
Collapse
Affiliation(s)
- Stéphane P. Roche
- Department of Chemistry and Biochemistry
- Florida Atlantic University
- Boca Raton, USA
| | - Shyam S. Samanta
- Department of Chemistry and Biochemistry
- Florida Atlantic University
- Boca Raton, USA
| | | |
Collapse
|
7
|
Li JX, Eidman K, Gan XW, Haefliger OP, Carroll PJ, Pika J. Identification of (S,S)-γ-glutamyl-(cis-S-1-propenyl)thioglycine, a naturally occurring norcysteine derivative, from the Chinese vegetable Toona sinensis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:7470-7476. [PMID: 23841695 DOI: 10.1021/jf401946d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Extracts of Toona sinensis shoots were studied to identify the precursors of volatile sulfur-containing flavor molecules. T. sinensis was found to contain new compounds (S,S)-γ-glutamyl-(cis-S-1-propenyl)thioglycine, 1, (S,S)-γ-glutamyl-(trans-S-1-propenyl)thioglycine, 2, and γ-glutamyl-(cis-S-1-propenyl)-cysteine, 3. The structures of these compounds were determined by interpretation of multistage mass spectrometric (MS(n)), 1D, and 2D NMR data. The absolute configuration of 1 was established by comparison of experimental with computed infrared and vibrational circular dichroism spectra. Because of the flexibility of the molecule and the novelty of the structure, the configuration was further confirmed by X-ray crystallography. Compounds 1 and 2 are the first examples of norcysteine-containing metabolites reported from nature. They may release thiols via cleavage of the amide bond by proteases, followed by spontaneous decomposition of the resulting unstable alk(en)yl norcysteine moiety.
Collapse
Affiliation(s)
- Jia-Xiao Li
- Firmenich Aromatics (China) Co., Ltd. , No 3901 JinDu Road, Xinzhuang Industry Park, Shanghai 201108, China
| | | | | | | | | | | |
Collapse
|
8
|
Erchegyi J, Grace CRR, Samant M, Cescato R, Piccand V, Riek R, Reubi JC, Rivier JE. Ring size of somatostatin analogues (ODT-8) modulates receptor selectivity and binding affinity. J Med Chem 2008; 51:2668-75. [PMID: 18410084 PMCID: PMC2782568 DOI: 10.1021/jm701444y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The synthesis, biological testing, and NMR studies of several analogues of H-c[Cys (3)-Phe (6)-Phe (7)-DTrp (8)-Lys (9)-Thr (10)-Phe (11)-Cys (14)]-OH (ODT-8, a pan-somatostatin analogue, 1) have been performed to assess the effect of changing the stereochemistry and the number of atoms in the disulfide bridge on binding affinity. Cysteine at positions 3 and/or 14 (somatostatin numbering) were/was substituted with d-cysteine, norcysteine, D-norcysteine, homocysteine, and/or D-homocysteine. The 3D structure analysis of selected partially selective, bioactive analogues (3, 18, 19, and 21) was carried out in dimethylsulfoxide. Interestingly and not unexpectedly, the 3D structures of these analogues comprised the pharmacophore for which the analogues had the highest binding affinities (i.e., sst 4 in all cases).
Collapse
Affiliation(s)
- Judit Erchegyi
- The Clayton Foundation Laboratories for Peptide Biology and Structural Biology Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, California 92037, USA
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Grace CRR, Erchegyi J, Samant M, Cescato R, Piccand V, Riek R, Reubi JC, Rivier JE. Ring size in octreotide amide modulates differently agonist versus antagonist binding affinity and selectivity. J Med Chem 2008; 51:2676-81. [PMID: 18410083 DOI: 10.1021/jm701445q] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
H-DPhe (2)-c[Cys (3)-Phe (7)-DTrp (8)-Lys (9)-Thr (10)-Cys (14)]-Thr (15)-NH2 (1) (a somatostatin agonist, SRIF numbering) and H-Cpa (2)-c[DCys (3)-Tyr (7)-DTrp (8)-Lys (9)-Thr (10)-Cys (14)]-Nal (15)-NH2 (4) (a somatostatin antagonist) are based on the structure of octreotide that binds to three somatostatin receptor subtypes (sst 2/3/5) with significant binding affinity. Analogues of 1 and 4 were synthesized with norcysteine (Ncy), homocysteine (Hcy), or D-homocysteine (DHcy) at positions 3 and/or 14. Introducing Ncy at positions 3 and 14 constrained the backbone flexibility, resulting in loss of binding affinity at all sst s. The introduction of Hcy at positions 3 and 14 improved selectivity for sst 2 as a result of significant loss of binding affinity at the other sst s. Substitution by DHcy at position 3 in the antagonist scaffold (5), on the other hand, resulted in a significant loss of binding affinity at sst 2 and sst 3 as compared to the different affinities of the parent compound (4). The 3D NMR structures of the analogues in dimethylsulfoxide are consistent with the observed binding affinities.
Collapse
Affiliation(s)
- Christy Rani R Grace
- Structural Biology Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, California 92037, USA
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Samant MP, Rivier JE. Synthesis of protected norcysteines for SPPS compatible with Fmoc-strategy. Tetrahedron Lett 2007; 48:5107-5110. [PMID: 19562100 DOI: 10.1016/j.tetlet.2007.05.082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the synthesis of racemic Alloc-Ncy(Tmob)-OH, the resolution of its methyl ester, and demonstrate its application to form a norcystine bridge in octreotide-amide using the Fmoc-strategy on solid phase. N-Alloc and S-Tmob protections of norcysteine (Ncy) were found to be a preferred choice for Fmoc-strategy over three other protected norcysteines synthesized i.e. Fmoc-Ncy(tBu)-OH, Alloc-Ncy(tBu)-OH and Alloc-Ncy(Trt)-OH.
Collapse
Affiliation(s)
- Manoj P Samant
- The Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, California 92037, USA
| | | |
Collapse
|
11
|
Samant MP, White R, Hong DJ, Croston G, Conn PM, Janovick JA, Rivier J. Structure-activity relationship studies of gonadotropin-releasing hormone antagonists containing S-aryl/alkyl norcysteines and their oxidized derivatives. J Med Chem 2007; 50:2067-77. [PMID: 17402723 PMCID: PMC2536683 DOI: 10.1021/jm0613931] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of acyline analogues incorporating l- and d-isomers of S-arylated/alkylated norcysteines [Ncy(R), where R is 2-naphthyl, methyl, and isopropyl] at positions 1, 4, 7, and 10 were synthesized. Some of these analogues were mono- and dioxidized to sulfoxides and sulfones. All of the analogues of acyline were screened for the antagonism of the GnRH-induced response in a reporter gene assay in HEK-293 cells expressing the human GnRH receptor. Nine of the analogues (9, 11, 15, 16, 17, 19, 20, 21, and 22) had antagonistic potency (IC50 < 2 nM) similar to that of acyline (IC50 = 0.52 nM) in this assay. Selected analogues (9, 11, 15, 16, 19, and 21) were tested in vitro for their antagonism at the rat GnRH-R in a reporter gene assay as well as in an in vivo intact male rat assay. Analogues 9 and 15 were the most potent in suppressing testosterone levels.
Collapse
Affiliation(s)
- Manoj P. Samant
- The Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, CA 92037
| | - Richard White
- Ferring Research Institute Inc., 3550 General Atomics Ct., Building 2, Room 442, San Diego, CA 92121
| | - Doley J. Hong
- Ferring Research Institute Inc., 3550 General Atomics Ct., Building 2, Room 442, San Diego, CA 92121
| | - Glenn Croston
- Ferring Research Institute Inc., 3550 General Atomics Ct., Building 2, Room 442, San Diego, CA 92121
| | - P. Michael Conn
- Divisions of Neuroscience and Reproductive Sciences, Oregon National Primate Research Center, Beaverton, OR 97006
- Departments of Physiology and Pharmacology and Cell and Developmental Biology, Oregon Health and Science University, Portland, OR 97239
| | - Jo Ann Janovick
- Divisions of Neuroscience and Reproductive Sciences, Oregon National Primate Research Center, Beaverton, OR 97006
| | - Jean Rivier
- The Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, CA 92037
- Corresponding author: Jean Rivier, Ph.D. The Salk Institute for Biological Studies 10010 N. Torrey Pines Road La Jolla, CA 92037 Phone: 858−453−4100 ext. 1350 Fax: 858−552−1546
| |
Collapse
|