1
|
Ye Y, Berry M, Bock WJ, Cheng K, Nair SK, Park CS, Patman RL, Sakata S, Tran-Dubé M, Donaldson JS, Yang G, Liu G. Construction of Isoquinolone Scaffolds on DNA via Rhodium(III)-Catalyzed C-H Activation. Org Lett 2024; 26:3338-3342. [PMID: 38608176 DOI: 10.1021/acs.orglett.4c00604] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Indexed: 04/14/2024]
Abstract
Isoquinolone is one of the most common heterocyclic core structures in countless natural products and many bioactive compounds. Here, a highly efficient approach to synthesize isoquinolone scaffolds on DNA via rhodium(III)-catalyzed C-H activation has been described. This chemistry transformation is robust and has shown good compatibility with DNA, which is suitable for DNA-encoded library synthesis.
Collapse
Affiliation(s)
- Yusong Ye
- HitGen Inc., Building 6, No. 8 Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu 610200, Sichuan P. R. China
| | - Madeline Berry
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - William J Bock
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Kunpeng Cheng
- HitGen Inc., Building 6, No. 8 Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu 610200, Sichuan P. R. China
| | - Sajiv K Nair
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Christiana S Park
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Ryan L Patman
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Sylvie Sakata
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Michelle Tran-Dubé
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Joyann S Donaldson
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Guanyu Yang
- HitGen Inc., Building 6, No. 8 Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu 610200, Sichuan P. R. China
| | - Guansai Liu
- HitGen Inc., Building 6, No. 8 Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu 610200, Sichuan P. R. China
| |
Collapse
|
2
|
Jensen-Pergakes K, Tatlock J, Maegley KA, McAlpine IJ, McTigue MA, Xie T, Dillon CP, Wang Y, Yamazaki S, Spiegel N, Shi M, Nemeth A, Miller N, Hendrickson E, Lam H, Sherrill J, Chung CY, McMillan EA, Bryant SK, Palde P, Braganza J, Brooun A, Deng YL, Goshtasbi V, Kephart SE, Kumpf RA, Liu W, Patman RL, Rui E, Scales S, Tran-Dube M, Wang F, Wythes M, Paul TA. SAM Competitive PRMT5 Inhibitor PF-06939999 Demonstrates Antitumor Activity in Splicing Dysregulated NSCLC with Decreased Liability of Drug Resistance. Mol Cancer Ther 2021; 21:3-15. [PMID: 34737197 DOI: 10.1158/1535-7163.mct-21-0620] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/15/2021] [Accepted: 10/29/2021] [Indexed: 11/16/2022]
Abstract
Protein arginine methyltransferase 5 (PRMT5) over-expression in hematological and solid tumors methylates arginine residues on cellular proteins involved in important cancer functions including cell cycle regulation, mRNA splicing, cell differentiation, cell signaling, and apoptosis. PRMT5 methyltransferase function has been linked with high rates of tumor cell proliferation and decreased overall survival, and PRMT5 inhibitors are currently being explored as an approach for targeting cancer-specific dependencies due to PRMT5 catalytic function. Here we describe the discovery of potent and selective S-adenosylmethionine (SAM) competitive PRMT5 inhibitors, with in vitro and in vivo characterization of clinical candidate PF-06939999. Acquired resistance mechanisms were explored through the development of drug resistant cell lines. Our data highlight compound-specific resistance mutations in the PRMT5 enzyme that demonstrate structural constraints in the co-factor binding site that prevent emergence of complete resistance to SAM site inhibitors. PRMT5 inhibition by PF-06939999 treatment reduced proliferation of NSCLC cancer cells, with dose-dependent decreases in symmetric dimethyl arginine (SDMA) levels and changes in alternative splicing of numerous pre-mRNAs. Drug sensitivity to PF-06939999 in NSCLC cells associates with cancer pathways including MYC, cell cycle and spliceosome, and with mutations in splicing factors such as RBM10. Translation of efficacy in mouse tumor xenograft models with splicing mutations provides rationale for therapeutic use of PF-06939999 in the treatment of splicing dysregulated NSCLC.
Collapse
Affiliation(s)
| | | | | | | | | | - Tao Xie
- Oncology Research Unit, Pfizer Inc
| | | | - Yuli Wang
- Oncology Research Division, Pfizer, Inc
| | - Shinji Yamazaki
- Drug Metabolism & Pharmacokinetics, Johnson & Johnson (United States)
| | | | - Manli Shi
- Oncology Research Division, Pfizer, Inc
| | | | | | | | - Hieu Lam
- Oncology-Rinat Research Units, Pfizer Worldwide Research and Development
| | | | - Chi-Yeh Chung
- Pfizer Oncology Research Unit, Pfizer (United States)
| | | | | | | | | | | | - Ya-Li Deng
- Oncology Medicinal Chemistry, Pfizer, Inc
| | | | | | | | - Wei Liu
- Oncology Medicinal Chemistry, Pfizer, Inc
| | | | - Eugene Rui
- Oncology Medicinal Chemistry, Pfizer, Inc
| | | | | | - Fen Wang
- Oncology Medicinal Chemistry, Pfizer, Inc
| | | | - Thomas A Paul
- Pfizer Oncology Research Unit, Pfizer (United States)
| |
Collapse
|
3
|
Patman RL, Barber JS, Kong D, Li W, McAlpine IJ, Nair SK, Sakata SK, Sun N. Rhodium(III)-Catalyzed C–H Activation: Annulation of Petrochemical Feedstocks for the Construction of Isoquinolone Scaffolds. Synlett 2021. [DOI: 10.1055/s-0040-1706548] [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: 10/22/2022]
Abstract
AbstractWe describe a simple and robust procedure for the Rh(III)-catalyzed [4+2] cycloaddition of feedstock gases enabled through C–H activation. A diverse set of 3,4-dihydroisoquinolones and 3-methylisoquinolones have been prepared in good to excellent yields. The effects of using ethylene and propyne as coupling partners on C–H site selectivity have also been explored with a representative set of substrates and are discussed herein.
Collapse
|
4
|
Barber JS, Burtea A, Collins MR, Tran-Dubé M, Patman RL, Scales S, Smith G, Spangler JE, Wang F, Wang W, Yang S, Zhu J, Montgomery TP. Development of a Late-Stage Diversification Strategy for the 4- and 5-Positions of 4,5,6-Trisubstituted Indazoles. Org Lett 2020; 22:9047-9052. [PMID: 33166447 DOI: 10.1021/acs.orglett.0c03440] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Indazoles represent a privileged motif in drug discovery. However, the formation of highly substituted indazoles can require the execution of lengthy synthetic routes with minimal opportunities to introduce diversity. In this report, we disclose the development of a late-stage diversification strategy for the 4- and 5-positions of 4,5,6-trisubstituted indazoles. A regioselective C-H functionalization and subsequent nucleophilic aromatic substitution provide two sequential points of diversification. The synthetic sequence delivers rapid access to an array of 4,5,6-trisubstituted indazoles in only four steps from readily available starting materials.
Collapse
Affiliation(s)
- Joyann S Barber
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Alexander Burtea
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Michael R Collins
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Michelle Tran-Dubé
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Ryan L Patman
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Stephanie Scales
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Graham Smith
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Jillian E Spangler
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Fen Wang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Wei Wang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Shouliang Yang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - JinJiang Zhu
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - T Patrick Montgomery
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| |
Collapse
|
5
|
Kang T, Erbay TG, Xu KL, Gallego GM, Burtea A, Nair SK, Patman RL, Zhou R, Sutton SC, McAlpine IJ, Liu P, Engle KM. Multifaceted Substrate-Ligand Interactions Promote the Copper-Catalyzed Hydroboration of Benzylidenecyclobutanes and Related Compounds. ACS Catal 2020; 10:13075-13083. [PMID: 33791144 DOI: 10.1021/acscatal.0c03622] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A unified synthetic strategy to access tertiary four-membered carbo/heterocyclic boronic esters is reported. Use of a Cu(I) catalyst in combination with a modified dppbz ligand enables regioselective hydroboration of various trisubstituted benzylidenecyclobutanes and carbo/heterocyclic analogs. The reaction conditions are mild, and the method tolerates a wide range of medicinally relevant heteroarenes. The protocol can be conveniently conducted on gram-scale, and the tertiary boronic ester products undergo facile diversification into valuable targets. Reaction kinetics and computational studies indicate that the migratory insertion step is turnover-limiting and accelerated by electron-withdrawing groups on the dppbz ligand. Energy decomposition analysis (EDA) calculations reveal that electron-deficient P-aryl groups on the dppbz ligand enhance the T-shaped π/π interactions with the substrate and stabilize the migratory insertion transition state.
Collapse
Affiliation(s)
- Taeho Kang
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Tuğçe G. Erbay
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Kane L. Xu
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Gary M. Gallego
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Alexander Burtea
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Sajiv K. Nair
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Ryan L. Patman
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Ru Zhou
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Scott C. Sutton
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Indrawan J. McAlpine
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Keary M. Engle
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
6
|
Medina JM, Kang T, Erbay TG, Shao H, Gallego GM, Yang S, Tran-Dubé M, Richardson PF, Derosa J, Helsel RT, Patman RL, Wang F, Ashcroft CP, Braganza JF, McAlpine I, Liu P, Engle KM. Cu-Catalyzed Hydroboration of Benzylidenecyclopropanes: Reaction Optimization, (Hetero)Aryl Scope, and Origins of Pathway Selectivity. ACS Catal 2019; 9:11130-11136. [PMID: 32617185 DOI: 10.1021/acscatal.9b03557] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The copper-catalyzed hydroboration of benzylidenecyclopropanes, conveniently accessed in one step from readily available benzaldehydes, is reported. Under otherwise identical reaction conditions, two distinct phosphine ligands grant access to different products by either suppressing or promoting cyclopropane opening via β-carbon elimination. Computational studies provide insight into how the rigidity and steric environment of these different bis-phosphine ligands influence the relative activation energies of β-carbon elimination versus protodecupration from the key benzylcopper intermediate. The method tolerates a wide variety of heterocycles prevalent in clinical and pre-clinical drug development, giving access to valuable synthetic intermediates. The versatility of the tertiary cyclopropylboronic ester products is demonstrated through several derivatization reactions.
Collapse
Affiliation(s)
- Jose M. Medina
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Taeho Kang
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Tuğçe G. Erbay
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Huiling Shao
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Gary M. Gallego
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Shouliang Yang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Michelle Tran-Dubé
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Paul F. Richardson
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Joseph Derosa
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ryan T. Helsel
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ryan L. Patman
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Fen Wang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Christopher P. Ashcroft
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - John F. Braganza
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Indrawan McAlpine
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Keary M. Engle
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
7
|
Barber JS, Scales S, Tran-Dubé M, Wang F, Sach NW, Bernier L, Collins MR, Zhu J, McAlpine IJ, Patman RL. Rhodium(III)-Catalyzed C-H Activation: Ligand-Controlled Regioselective Synthesis of 4-Methyl-Substituted Dihydroisoquinolones. Org Lett 2019; 21:5689-5693. [PMID: 31264873 DOI: 10.1021/acs.orglett.9b02029] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Rh-catalyzed C-H functionalization of O-pivaloyl benzhydroxamic acids with propene gas provides access to 4-methyl-substituted dihydroisoquinolones. Good to excellent levels of regioselectivity are achieved using [CptRhCl2]2 as a precatalyst under optimized conditions. Thorough examination of aryl/heteroaryl O-pivaloyl hydroxamic acid substrates, ligand effects on C-H site selectivity, alkene scope, and demonstration of scale are discussed within.
Collapse
Affiliation(s)
- Joyann S Barber
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Stephanie Scales
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Michelle Tran-Dubé
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Fen Wang
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Neal W Sach
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Louise Bernier
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Michael R Collins
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - JinJiang Zhu
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Indrawan J McAlpine
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Ryan L Patman
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| |
Collapse
|
8
|
Derosa J, O'Duill ML, Holcomb M, Boulous MN, Patman RL, Wang F, Tran-Dubé M, McAlpine I, Engle KM. Copper-Catalyzed Chan-Lam Cyclopropylation of Phenols and Azaheterocycles. J Org Chem 2018; 83:3417-3425. [PMID: 29498847 DOI: 10.1021/acs.joc.7b03100] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Small molecules containing cyclopropane-heteroatom linkages are commonly needed in medicinal chemistry campaigns yet are problematic to prepare using existing methods. To address this issue, a scalable Chan-Lam cyclopropylation reaction using potassium cyclopropyl trifluoroborate has been developed. With phenol nucleophiles, the reaction effects O-cyclopropylation, whereas with 2-pyridones, 2-hydroxybenzimidazoles, and 2-aminopyridines the reaction brings about N-cyclopropylation. The transformation is catalyzed by Cu(OAc)2 and 1,10-phenanthroline and employs 1 atm of O2 as the terminal oxidant. This method is operationally convenient to perform and provides a simple, strategic disconnection toward the synthesis of cyclopropyl aryl ethers and cyclopropyl amine derivatives bearing an array of functional groups.
Collapse
Affiliation(s)
- Joseph Derosa
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Miriam L O'Duill
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Matthew Holcomb
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Mark N Boulous
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Ryan L Patman
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Fen Wang
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Michelle Tran-Dubé
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Indrawan McAlpine
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Keary M Engle
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| |
Collapse
|
9
|
Leung JC, Patman RL, Sam B, Krische MJ. Alkyne-aldehyde reductive C-C coupling through ruthenium-catalyzed transfer hydrogenation: direct regio- and stereoselective carbonyl vinylation to form trisubstituted allylic alcohols in the absence of premetallated reagents. Chemistry 2011; 17:12437-43. [PMID: 21953608 DOI: 10.1002/chem.201101554] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 08/11/2011] [Indexed: 11/08/2022]
Abstract
Nonsymmetric 1,2-disubstituted alkynes engage in reductive coupling to a variety of aldehydes under the conditions of ruthenium-catalyzed transfer hydrogenation by employing formic acid as the terminal reductant and delivering the products of carbonyl vinylation with good to excellent levels of regioselectivity and with complete control of olefin stereochemistry. As revealed in an assessment of the ruthenium counterion, iodide plays an essential role in directing the regioselectivity of C-C bond formation. Isotopic labeling studies corroborate reversible catalytic propargyl C-H oxidative addition in advance of the C-C coupling, and demonstrate that the C-C coupling products do not experience reversible dehydrogenation by way of enone intermediates. This transfer hydrogenation protocol enables carbonyl vinylation in the absence of stoichiometric metallic reagents.
Collapse
Affiliation(s)
- Joyce C Leung
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station, A5300, Austin, TX 78712-1167, USA
| | | | | | | |
Collapse
|
10
|
Bausch CC, Patman RL, Breit B, Krische MJ. Divergent Regioselectivity in the Synthesis of Trisubstituted Allylic Alcohols by Nickel- and Ruthenium-Catalyzed Alkyne Hydrohydroxymethylation with Formaldehyde. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201101496] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
11
|
Bausch CC, Patman RL, Breit B, Krische MJ. Divergent Regioselectivity in the Synthesis of Trisubstituted Allylic Alcohols by Nickel- and Ruthenium-Catalyzed Alkyne Hydrohydroxymethylation with Formaldehyde. Angew Chem Int Ed Engl 2011; 50:5687-90. [DOI: 10.1002/anie.201101496] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Indexed: 11/07/2022]
|
12
|
Bechem B, Patman RL, Hashmi ASK, Krische MJ. Enantioselective carbonyl allylation, crotylation, and tert-prenylation of furan methanols and furfurals via iridium-catalyzed transfer hydrogenation. J Org Chem 2010; 75:1795-8. [PMID: 20131774 DOI: 10.1021/jo902697g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [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
5-Substituted-2-furan methanols 1a-c are subject to enantioselective carbonyl allylation, crotylation and tert-prenylation upon exposure to allyl acetate, alpha-methyl allyl acetate, or 1,1-dimethylallene in the presence of an ortho-cyclometalated iridium catalyst modified by (R)-Cl,MeO-BIPHEP, (R)-C3-TUNEPHOS, and (R)-C3-SEGPHOS, respectively. In the presence of 2-propanol, but under otherwise identical conditions, the corresponding substituted furfurals 2a-c are converted to identical products of allylation, crotylation, and tert-prenylation. Optically enriched products of carbonyl allylation, crotylation, and reverse prenylation 3b, 4b, and 5b were subjected to Achmatowicz rearrangement to furnish the corresponding gamma-hydroxy-beta-pyrones 6a-c, respectively, with negligible erosion of enantiomeric excess.
Collapse
Affiliation(s)
- Benjamin Bechem
- Organisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg, D-69120 Heidelberg, Germany
| | | | | | | |
Collapse
|
13
|
Williams VM, Leung JC, Patman RL, Krische MJ. Hydroacylation of 2-Butyne from the Alcohol or Aldehyde Oxidation Level via Ruthenium Catalyzed C-C Bond Forming Transfer Hydrogenation. Tetrahedron 2009; 65:5024-5029. [PMID: 20613891 PMCID: PMC2897757 DOI: 10.1016/j.tet.2009.03.068] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Under the conditions of ruthenium catalyzed transfer hydrogenation, 2-butyne couples to alcohols 1a-1j to deliver alpha,beta-unsaturated ketones 3a-3j in good to excellent isolated yields with complete E-stereoselectivity. Under identical conditions, aldehydes 2a-2j couple to 2-butyne to provide an identical set of alpha,beta-unsaturated ketones 3a-3j in good to excellent isolated yields with complete E-stereoselectivity. Nonsymmetric alkyne 4a couples to alcohol 1d or aldehyde 2d in good yield to deliver enone 3k as a 5:1 mixture of regioisomers. Thus, intermolecular alkyne hydroacylation is achieved from the alcohol or aldehyde oxidation level. In earlier studies employing the same ruthenium catalyst under slightly different conditions, alkynes were coupled to carbonyl partners from the alcohol or aldehyde oxidation level to furnish allylic alcohols. Therefore, under the conditions of C-C bond forming transfer hydrogenation, all oxidation levels of substrate (alcohol or aldehyde) and product (allylic alcohol or alpha,beta-unsaturated ketone) are accessible.
Collapse
Affiliation(s)
- Vanessa M. Williams
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, TX 78712
| | - Joyce C. Leung
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, TX 78712
| | - Ryan L. Patman
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, TX 78712
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, TX 78712
| |
Collapse
|
14
|
Patman RL, Chaulagain MR, Williams VM, Krische MJ. Direct vinylation of alcohols or aldehydes employing alkynes as vinyl donors: a ruthenium catalyzed C-C bond-forming transfer hydrogenation. J Am Chem Soc 2009; 131:2066-7. [PMID: 19173651 DOI: 10.1021/ja809456u] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.9] [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
Under the conditions of ruthenium catalyzed transfer hydrogenation, 2-butyne couples to benzylic and aliphatic alcohols 1a-1l to furnish allylic alcohols 2a-2l, constituting a direct C-H vinylation of alcohols employing alkynes as vinyl donors. Under related transfer hydrogenation conditions employing formic acid as terminal reductant, 2-butyne couples to aldehydes 4a, 4b, and 4e to furnish identical products of carbonyl vinylation 2a, 2b, and 2e. Thus, carbonyl vinylation is achieved from the alcohol or the aldehyde oxidation level in the absence of any stoichiometric metallic reagents. Nonsymmetric alkynes 6a-6c couple efficiently to aldehyde 4b to provide allylic alcohols 2m-2o as single regioisomers. Acetylenic aldehyde 7a engages in efficient intramolecular coupling to deliver cyclic allylic alcohol 8a.
Collapse
Affiliation(s)
- Ryan L Patman
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712, USA
| | | | | | | |
Collapse
|
15
|
Bower JF, Kim IS, Patman RL, Krische MJ. Catalytic carbonyl addition through transfer hydrogenation: a departure from preformed organometallic reagents. Angew Chem Int Ed Engl 2009; 48:34-46. [PMID: 19040235 PMCID: PMC2775511 DOI: 10.1002/anie.200802938] [Citation(s) in RCA: 260] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Classical protocols for carbonyl allylation, propargylation and vinylation typically rely upon the use of preformed allyl metal, allenyl metal and vinyl metal reagents, respectively, mandating stoichiometric generation of metallic byproducts. Through transfer hydrogenative C-C coupling, however, carbonyl addition may be achieved from the aldehyde or alcohol oxidation level in the absence of stoichiometric organometallic reagents or metallic reductants. Here, we review transfer hydrogenative methods for carbonyl addition, which encompass the first catalytic protocols enabling direct C-H functionalization of alcohols.
Collapse
Affiliation(s)
- John F. Bower
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station – A5300, Austin, TX 78712-1167 (USA)
| | - In Su Kim
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station – A5300, Austin, TX 78712-1167 (USA)
| | - Ryan L. Patman
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station – A5300, Austin, TX 78712-1167 (USA)
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station – A5300, Austin, TX 78712-1167 (USA)
| |
Collapse
|
16
|
Patman RL, Williams VM, Bower JF, Krische MJ. Carbonyl propargylation from the alcohol or aldehyde oxidation level employing 1,3-enynes as surrogates to preformed allenylmetal reagents: a ruthenium-catalyzed C-C bond-forming transfer hydrogenation. Angew Chem Int Ed Engl 2008; 47:5220-3. [PMID: 18528831 DOI: 10.1002/anie.200801359] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ryan L Patman
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station-A5300, Austin, TX 78712-1167, USA
| | | | | | | |
Collapse
|
17
|
Bower JF, Patman RL, Krische MJ. Iridium-catalyzed C-C coupling via transfer hydrogenation: carbonyl addition from the alcohol or aldehyde oxidation level employing 1,3-cyclohexadiene. Org Lett 2008; 10:1033-5. [PMID: 18254642 PMCID: PMC2860772 DOI: 10.1021/ol800159w] [Citation(s) in RCA: 106] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Under hydrogen autotransfer conditions employing a catalyst derived from [Ir(cod)Cl]2 and BIPHEP, 1,3-cyclohexadiene (CHD) couples to benzylic alcohols 1a-9a to furnish carbonyl addition products 1c-9c, which appear as single diastereomers with variable quantities of regioisomeric adducts 1d-9d. Under related transfer hydrogenation conditions employing isopropanol as terminal reductant, identical carbonyl adducts 1c-9c are obtained from the aldehyde oxidation level. Isotopic labeling studies corroborate a mechanism involving hydrogen donation from the reactant alcohol or sacrificial alcohol (i-PrOH).
Collapse
Affiliation(s)
- John F Bower
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, Texas 78712, USA
| | | | | |
Collapse
|
18
|
Patman RL, Bower JF, Kim IS, Krische MJ. Formation of C-C Bonds via Catalytic Hydrogenation and Transfer Hydrogenation: Vinylation, Allylation, and Enolate Addition of Carbonyl Compounds and Imines. Aldrichimica Acta 2008; 41:95-104. [PMID: 22403445 PMCID: PMC3295582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- Ryan L. Patman
- Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station - A5300, Austin, TX 78712-1167, USA
| | - John F. Bower
- Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station - A5300, Austin, TX 78712-1167, USA
| | - In Su Kim
- Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station - A5300, Austin, TX 78712-1167, USA
| | - Michael J. Krische
- Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station - A5300, Austin, TX 78712-1167, USA
| |
Collapse
|
19
|
Bower JF, Skucas E, Patman RL, Krische MJ. Catalytic C−C Coupling via Transfer Hydrogenation: Reverse Prenylation, Crotylation, and Allylation from the Alcohol or Aldehyde Oxidation Level. J Am Chem Soc 2007; 129:15134-5. [DOI: 10.1021/ja077389b] [Citation(s) in RCA: 131] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John F. Bower
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, Texas 78712
| | - Eduardas Skucas
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, Texas 78712
| | - Ryan L. Patman
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, Texas 78712
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, Texas 78712
| |
Collapse
|