TBAT-Mediated Nitrone Formation of ω-Mesyloxy-<i>O-tert</i>-butyldiphenylsilyl-oximes: Facile Synthesis of Cyclic Nitrones from Hemiacetals
作者:Osamu Tamura、Hiroyuki Ishibashi、Atsushi Toyao
DOI:10.1055/s-2002-32988
日期:——
Chiral and cyclic nitrones were synthesized by TBAT-mediated desilylative cyclization of ω-mesyloxy-O-tert-butyl-diphenylsilyloximes, readily prepared from sugar derivatives by a consecutive treatment with O-tert-butyldiphenylsilylhydroxylamine and with mesyl chloride. The method was applied to sequential nitrone formation and intramolecular cycloaddition.
手性和环状硝酮是通过 TBAT 介导的 ω-甲磺酰氧基-O-叔丁基-二苯基甲硅烷基肟的脱甲硅烷基化环化合成的,通过用 O-叔丁基二苯基甲硅烷基羟胺和甲磺酰氯连续处理从糖衍生物中很容易制备。该方法应用于连续硝酮形成和分子内环加成。