作者:Joseph F. Cassidy、J. Michael Williams
DOI:10.1016/s0040-4039(00)94273-4
日期:——
Vinyl sulphones (1-sulphonyl glycals) are formed in good yield by elimination of propanone from 2,3--isopropylidene derivatives of -mannopyranosyl and -rhanmopyranosyl sulphones. Attempted conjugate addition of carbon nucleophiles to these vinyl sulphones, which are deactivated towards nucleophiles by the ring oxygen atom, was unsuccessful but lithiatlon followed by methylation yielded the 2-methyl
通过从-甘露吡喃糖基和-rhanmopyranosyl砜的2,3--异亚丙基衍生物中除去丙酮,可以高产率形成乙烯基砜(1-磺酰基糖基)。尝试将碳亲核试剂共轭添加到这些乙烯基砜中,但通过环氧原子使之向亲核试剂失活,但没有成功,但是当使用叔丁基砜而不是苯基砜时,锂离子化然后进行甲基化反应生成了2-甲基乙烯基砜衍生物。