HIGHLY REGIOSELECTIVE AND STEREOSELECTIVE RADICAL ADDITION OF<i>p</i>-TsBr TO α-ALLENIC ALCOHOLS AND THEIR ELIMINATION REACTION: SYNTHESIS OF β-<i>p</i>-TOSYL-SUBSTITUTED α,β-UNSATURATED KETONES
作者:Suk-Ku Kang、Byung-Su Ko、Dong-Min Lee
DOI:10.1081/scc-120014030
日期:2002.1
ABSTRACT Regio- and stereoselective radical addition of α-allenic alcohols with p-TsBr in the presence of a catalytic amount of AIBN afforded (E)-γ-bromo-β-sulfonyl allylic alcohols in moderate yields. The base-promoted 1,4-elimination followed by isomerization to give β-sulfonyl-α,β-unsaturated ketones is described.
摘要 在催化量的 AIBN 存在下,α-丙二烯醇与 p-TsBr 的区域选择性和立体选择性自由基加成以中等收率得到 (E)-γ-溴-β-磺酰基烯丙醇。描述了碱促进的 1,4-消除,然后异构化得到 β-磺酰基-α,β-不饱和酮。