Trialkylborane as an Initiator and Terminator of Free Radical Reactions. Facile Routes to Boron Enolates via α-Carbonyl Radicals and Aldol Reaction of Boron Enolates
作者:Kyoko Nozaki、Koichiro Oshima、Kiitiro Utimoto
DOI:10.1246/bcsj.64.403
日期:1991.2
variety of trialkylborane-induced reactions were examined for the preparation of the α-carbonyl radicals: (1) addition of alkyl radical to methyl vinyl ketone, (2) reduction of α-halo ketone, and (3) intramolecular radical addition to α,β-unsaturated carbonyl moiety. Trialkylborane reacted with α-carbonyl radicals to give boron enolates. The resulting boron enolates were efficiently trapped by carbonyl
检查了各种三烷基硼烷诱导的反应以制备 α-羰基自由基:(1)烷基自由基与甲基乙烯基酮的加成,(2)α-卤代酮的还原,以及(3)分子内自由基加成到 α ,β-不饱和羰基部分。三烷基硼烷与α-羰基反应生成硼烯醇化物。所得硼烯醇化物被羰基化合物有效捕获,以良好的收率得到 β-羟基酮。