Preparative access to medicinal chemistry related chiral alcohols using carbonyl reductase technology
摘要:
Libraries of highly enantioenriched secondary alcohols in both enantiomeric forms were synthesised by enzymatic reduction of their parent ketones using selectAZyme (TM) carbonyl reductase (CRED) technology. Commercially available CREDs were able to reduce a range of substrate classes efficiently and with very high enantioselectivity. Matching substrate classes to small subsets of CREDs enabled the fast development of preparative bioreductions and the rapid generation of 100-1500 mg samples of chiral alcohols in typically >95% ee and the majority in >= 99.0% ee. The conditions for small scale synthesis were then scaled up to 0.5 kg to deliver one of the chiral alcohols, (S)-1-(4-bromophenyl)-2-chloroethanol, in 99.8% ee and 91% isolated yield. (C) 2013 Elsevier Ltd. All rights reserved.
Structural Contributions to Autocatalysis and Asymmetric Amplification in the Soai Reaction
作者:Soumitra V. Athavale、Adam Simon、K. N. Houk、Scott E. Denmark
DOI:10.1021/jacs.0c05994
日期:2020.10.28
autocatalysis, providing insights into the role played by reactant and alkoxide structure. The alkynyl substituent favorably tunes catalyst solubility, aggregation, and conformation while modulating substrate reactivity and selectivity. The alkyl groups and the heteroaromatic core play further complementary roles in catalyst aggregation and substrate binding. In the study of these structure-activity relationships
The asymmetric addition of pyridyl aluminum reagents to aldehydes has been successfully developed by employing a titanium(IV) catalytic system of (R)-H-8-BINOLate, which affords a series of valuable optically active diarylmethanols containing various pyridyl groups in high yields with excellent enantioselectivities of up to 98% ee.
SOAI, KENSO;NIWA, SEIJI;HORI, HIROSHI, J. CHEM. SOC. CHEM. COMMUN.,(1990) N4, C. 982-983
作者:SOAI, KENSO、NIWA, SEIJI、HORI, HIROSHI
DOI:——
日期:——
Preparative access to medicinal chemistry related chiral alcohols using carbonyl reductase technology
作者:Andrew S. Rowan、Thomas S. Moody、Roger M. Howard、Toby J. Underwood、Iain R. Miskelly、Yanan He、Bo Wang
DOI:10.1016/j.tetasy.2013.09.015
日期:2013.11
Libraries of highly enantioenriched secondary alcohols in both enantiomeric forms were synthesised by enzymatic reduction of their parent ketones using selectAZyme (TM) carbonyl reductase (CRED) technology. Commercially available CREDs were able to reduce a range of substrate classes efficiently and with very high enantioselectivity. Matching substrate classes to small subsets of CREDs enabled the fast development of preparative bioreductions and the rapid generation of 100-1500 mg samples of chiral alcohols in typically >95% ee and the majority in >= 99.0% ee. The conditions for small scale synthesis were then scaled up to 0.5 kg to deliver one of the chiral alcohols, (S)-1-(4-bromophenyl)-2-chloroethanol, in 99.8% ee and 91% isolated yield. (C) 2013 Elsevier Ltd. All rights reserved.