Pd(II)-Catalyzed Enantioselective C–H Activation of Cyclopropanes
摘要:
Systematic ligand development has led to the identification of novel mono-N-protected amino acid ligands for Pd(II)-catalyzed enantioselective C-H activation of cyclopropanes. A diverse range of organoboron reagents can be used as coupling partners, and the reaction proceeds under mild conditions. These results provide a new retro-synthetic disconnection for the construction of enantioenriched cis-substituted cyclopropanecarboxylic acids.
Ligand-Enabled β-C(sp<sup>3</sup>)–H Olefination of Free Carboxylic Acids
作者:Zhe Zhuang、Chang-Bin Yu、Gang Chen、Qing-Feng Wu、Yi Hsiao、Candice L. Joe、Jennifer X. Qiao、Michael A. Poss、Jin-Quan Yu
DOI:10.1021/jacs.8b06527
日期:2018.8.15
An acetyl-protected aminoethyl phenyl thioether has been developed to promote C(sp3)-H activation. Significant ligand enhancement is demonstrated by the realization of the first Pd(II)-catalyzed olefination of C(sp3)-H bonds of freecarboxylicacids without using an auxiliary. Subsequent lactonization of the olefinated product via 1,4 addition provided exclusively monoselectivity in the presence of
chiral ligand based on an ethylenediamine backbone was developed to achieve Pd-catalyzed enantioselective C(sp3)-H arylation of cyclopropanecarboxylic and 2-aminoisobutyric acids without using exogenous directing groups. This new chiral catalyst affords new disconnection for preparing diverse chiral carboxylic acids from simple starting materials that are complementary to the various ring forming approaches
carboxylic acids with organoborons has been realized using either mono-protected aminoacid (MPAA) ligands or mono-protected aminoethyl amine (MPAAM) ligands. A diverse range of aryl- and vinyl-boron reagents can be used as coupling partners to provide chiral carboxylic acids. This reaction provides an alternative approach to the enantioselective synthesis of cyclopropanecarboxylic acids and cyclobutanecarboxylic
[EN] PD(II)-CATALYZED ENANTIOSELECTIVE C-H ARYLATION OF FREE CARBOXYLIC ACIDS<br/>[FR] ARYLATION C-H ÉNANTIOSÉLECTIVE CATALYSÉE PAR PD(II) D'ACIDES CARBOXYLIQUES LIBRES
申请人:SCRIPPS RESEARCH INST
公开号:WO2019204477A1
公开(公告)日:2019-10-24
The invention includes procedures for stereoselective β-arylation of carboxylic acids having a β-carbon atom. For example, stereoselective arylation procedures include the following reactions: (I)
[EN] BICYCLIC TETRAHYDROAZEPINE DERIVATIVES FOR THE TREATMENT OF CANCER<br/>[FR] DÉRIVÉS BICYCLIQUES DE TÉTRAHYDROAZÉPINE POUR LE TRAITEMENT DU CANCER
申请人:HOFFMANN LA ROCHE
公开号:WO2022171745A1
公开(公告)日:2022-08-18
The present invention provides new bicyclic tetrahydroazepine derivatives having the general formula (I), wherein X, Y, R1, R2, R3, R4, R5, R6, R6aare as defined herein, compositions including the compounds, processes of manufacturing the compounds and methods of using them in the treatment of cancer.