Enantioselective Synthesis of Optically Active 3,3-Diarylpropanoates by Conjugate Hydrosilylation with Chiral Rh-bis(oxazolinyl)phenyl Catalysts
摘要:
Conjugate hydrosilylation of 3,3-diarylacrylate derivatives catalyzed by chiral rhodium-bis(oxazolinyl)phenyl complexes (1 mol %) at 60 degrees C for 2 h was investigated to prepare optically active 3,3-diarylpropanoate derivatives in high yields up to 99% yield and high enantioselectivities up to 99%.
Enantioselective Desymmetrization of Methylenedianilines via Enzyme-Catalyzed Remote Halogenation
作者:James T. Payne、Paul H. Butkovich、Yifan Gu、Kyle N. Kunze、Hyun June Park、Duo-Sheng Wang、Jared C. Lewis
DOI:10.1021/jacs.7b09573
日期:2018.1.17
engineering flavin-dependent halogenases (FDHs) with improved stability, expanded substrate scope, and altered regioselectivity. Here, we show that variants of rebeccamycin halogenase (RebH) catalyze enantioselective desymmetrization of methylenedianilines via halogenation of these substrates distal to their pro-stereogenic center. Structure-guided engineering was used to increase the conversion and