Organocatalyzed Asymmetric Conjugate Addition of Heteroaryl and Aryl Trifluoroborates: a Synthetic Strategy for Discoipyrrole D
作者:Jiun‐Le Shih、Thien S. Nguyen、Jeremy A. May
DOI:10.1002/anie.201503528
日期:2015.8.17
Bis‐heteroaryl or bis‐aryl stereocenters were formed by an organocatalytic enantioselective conjugateaddition using the respective trifluoroborate salts as nucleophiles. Control studies suggested that fluoride dissociation is necessary in the anhydrous conditions. This strategy is applicable to the synthesis of discoipyrroleD, an inhibitor of BR5 fibroblast migration.
A General Method for the Enantioselective Synthesis of α-Chiral Heterocycles
作者:Phong Q. Le、Thien S. Nguyen、Jeremy A. May
DOI:10.1021/ol3030605
日期:2012.12.7
The enantioselective formation of stereocenters proximal to unprotected heterocycles has been accomplished. Thus, vinyl boronic acids are added to heterocycle-appended enones via a modified-BINOL catalyst. Catalyst design was key to enable a general reaction. High yields and useful er’s are observed for a host of common heteroaryls.
Enantioselective Conjugate Addition of Alkenylboronic Acids to Indole-Appended Enones
作者:Brian J. Lundy、Santa Jansone-Popova、Jeremy A. May
DOI:10.1021/ol2020847
日期:2011.9.16
An enantioselective addition of alkenylboronic acids and alkynylboronic esters to unprotected indole-appended enones is reported. This transformation proceeds with high enantioselectivity and high product yields via the use of catalytic amounts of 3,3'-bis(pentafluorophenyl)-BINOL and Mg(Ot-Bu)(2). A range of a-branched indole derivatives are available from the transformation.