Unsaturated carbohydrates. Part 29 Their application to the synthesis of stereospecifically doubly and triply branched derivatives
作者:Robert J. Ferrier、Paul M. Petersen
DOI:10.1016/s0040-4020(01)97579-9
日期:1990.1
Treatment of 23-dideoxy-α---hex-2-enopyranosyl derivatives having 2-haloethyl substituents separately at O-1 and O-4 with tri--butyltin hydride together with a radical initiator gave products 16 and 56 with tetrahydrofuranyl rings -fused to C-1 C-2 and C-3 C-4 respectively. When these reactions which afforded compounds with stereospecific branch-points at C-2 and C-3 were carried out in the presence