Scope, Limitations and Mechanistic Analysis of the HyperBTM‐Catalyzed Acylative Kinetic Resolution of Tertiary Heterocyclic Alcohols**
作者:Samuel M. Smith、Mark D. Greenhalgh、Taisiia Feoktistova、Daniel M. Walden、James E. Taylor、David B. Cordes、Alexandra M. Z. Slawin、Paul Ha‐Yeon Cheong、Andrew D. Smith
DOI:10.1002/ejoc.202101111
日期:2022.1.11
isothiourea HyperBTM catalyzes the acylative kinetic resolution of a wide range of tertiary heterocyclic alcohols under mild conditions with high selectivity. The synthetic utility of the methodology has been demonstrated with the preparation of two bioactive targets. Kinetic analysis reveals a fractional reaction order with respect to the alcohol concentration.
Rh(I)-catalyzed asymmetric addition of arylboronic acids to NH isatins
作者:Jiangyang Gui、Guihua Chen、Peng Cao、Jian Liao
DOI:10.1016/j.tetasy.2012.04.013
日期:2012.4
The transition metal-catalyzed asymmetric variant of the title reaction is normally limited to N-protected isatins. However, Rh(I)/chiral sulfoxide phosphine complexes were found to catalyze the enantioselective addition of arylboronicacids to NH isatins under mild conditions. A variety of chiral 3-aryl-3-hydroxyl-2-oxindoles were obtained with high yields and with good to excellent enantioselectivities