The synthesis of d-ribofuranosyl derivatives of methyl propiolate and a study of the activating influence of the ester group in cylcoaddition reactions
作者:J.Grant Buchanan、Allan R. Edgar、Micahel J. Power、Gavin C. Williams
DOI:10.1016/s0008-6215(00)84457-2
日期:1977.5
2,3,5-Tri-O-benzyl-D-ribofuranosyl bromide (17) has been converted into methyl 3-(2,3,5-tri-O-benzyl-beta-D-ribofuranosyl) propiolate (8) and its alpha anomer 10 in 21 and 42% yields, respectively, by reaction with the silver salt of methylpropiolate. Attempts to prepare 8 from (beta-D-ribofuranosyl)ethyne (1) by standard methods were unsuccessful. The reactions of the esters 8 and 10 and the ethyne