Olefination of methyl (1S,2R,4R)-N-benzoyl-2-formyl-7-azabicyclo[2.2.1]heptane-1-carboxylate, a synthetic approach to new conformationally constrained prolines
摘要:
Wittig olefinations of methyl (1S,2R,4R)-N-benzoyl-2-formyl-7-azabicyclo[2.2.1]heptane-1-carboxylate with several phosphoranes and the Horner-Wittig reaction, using methyl diethylphosphonoacetate, have been tested in order to evaluate their utility in the synthesis of beta-substituted conformationally constrained prolines. Subsequent elaboration of the resulting alkenes has provided proline-amino acid chimeras [combinations of proline with other alpha-amino acids, such as L-norvaline, L-norleucine, L-alpha-(3-phenylpropyl)glycine or L-homoglutamic acid] with the 7-azabicyclo[2.2.1]heptane skeleton in an enantiomerically pure form. (C) 2003 Elsevier Science Ltd. All rights reserved.
Olefination of methyl (1S,2R,4R)-N-benzoyl-2-formyl-7-azabicyclo[2.2.1]heptane-1-carboxylate, a synthetic approach to new conformationally constrained prolines
摘要:
Wittig olefinations of methyl (1S,2R,4R)-N-benzoyl-2-formyl-7-azabicyclo[2.2.1]heptane-1-carboxylate with several phosphoranes and the Horner-Wittig reaction, using methyl diethylphosphonoacetate, have been tested in order to evaluate their utility in the synthesis of beta-substituted conformationally constrained prolines. Subsequent elaboration of the resulting alkenes has provided proline-amino acid chimeras [combinations of proline with other alpha-amino acids, such as L-norvaline, L-norleucine, L-alpha-(3-phenylpropyl)glycine or L-homoglutamic acid] with the 7-azabicyclo[2.2.1]heptane skeleton in an enantiomerically pure form. (C) 2003 Elsevier Science Ltd. All rights reserved.
[EN] ARGINASE INHIBITORS AND METHODS OF USE<br/>[FR] INHIBITEURS D'ARGINASE ET MÉTHODES D'UTILISATION
申请人:MERCK SHARP & DOHME
公开号:WO2021141751A1
公开(公告)日:2021-07-15
Described herein are compounds of Formula I or a pharmaceutically acceptable salt thereof. The compounds of Formula I act as arginase inhibitors and can be useful in preventing, treating or acting as a remedial agent for arginase-related diseases.
Asymmetric Synthesis of β,β-Disubstituted Alanines via a Sequential C(sp2)–C(sp3) Cross-Coupling–Hydrogenation Strategy
作者:David A. Petrone、Jonathan Maturano、James Herbort、Erin E. Plasek、J. Mayeli Vivaldo-Nikitovic、David Sarlah
DOI:10.1021/acs.orglett.4c02376
日期:2024.7.26
allows access to a diverse array of valuable β,β-disubstituted alanine derivatives. This synthesis exhibits broad functional group tolerance, and permits efficient access to β-aryl-β-alkyl, and the more rarely reported β,β-dialkyl Ala derivatives with high yield and excellent enantioselectivity. This transformation has been exhibited on decagram quantity, and can be used to generate Fmoc aminoacid derivatives