Ferrier Rearrangement of 1,2-Dihydropyrans with Organozinc Species in Toluene/n-Dibutyl Ether
作者:Simon Wagschal、Sébastien Lemaire、Pauline Rabet
DOI:10.1055/s-0036-1588485
日期:2017.10
Herein, we report the catalyst-free addition of organozinc species to glycalderivatives and dihydropyrans in a toluene/ n -dibutyl ether solvent mixture via a Ferrier rearrangement at room temperature. This methodology requires only a slight excess of the nucleophile and leads preferentially to the C-glycoside α-anomer. Various 1,2-dihydropyrans were assessed with a range of nucleophiles (aryl, alkynyl
Enzymatic resolution of racemic glycals: an application of the wong acylation method
作者:David B. Berkowitz、Samuel J. Danishefsky
DOI:10.1016/0040-4039(91)80067-g
日期:1991.9
Kinetic resolution of racemic, fully synthetic, artificial glycals bearing a free hydroxyl group at C3 was accomplished through the more rapid acylation of the ''D''-antipode with vinyl acetate as acyl donor and Lipase PS-30 from Pseudomonas cepacia as catalyst.