Rh(II)-binaphthol phosphate catalysts in the enantioselective intramolecular oxonium ylide formation–[3,2] sigmatropic rearrangement of α-diazo-β-ketoesters
作者:David M. Hodgson、Margarita Petroliagi
DOI:10.1016/s0957-4166(01)00147-1
日期:2001.4
The enantioselective intramolecular oxonium ylide formation-[3.2] sigmatropic rearrangement of alpha -diazo-beta -ketoesters 9 using catalytic (1 mol%) dirhodium tetrakisbinaphthol phosphate catalysts 1 and 2 to give benzofuranones 11 in up tu 62% e.e. is described. (C) 2001 Elsevier Science Ltd. All rights reserved.