The first syntheses of enantiopure 2,2′-biindoline
作者:Steven M. Wales、Anthony C. Willis、Paul A. Keller
DOI:10.1039/c0cc04045b
日期:——
The first two syntheses of chiral 2,2â²-biindoline are reported either in five steps from 2,2â²-bioxirane, or three steps from 2,2â²-biaziridine, both with exceptional enantiopurity.
We herein report a general, practical, and highly efficient method for asymmetricsynthesis of a wide range of chiral vicinal diamines via reductive coupling of imines templated by chiral diboron. The protocol features high enantioselectivity and stereospecificity, mild reaction conditions, simple operating procedures, use of readily available starting materials, and a broad substrate scope. The method