Aminoborohydrides. 2. Regiospecific reductions of α, β-unsaturated carbonyl compounds with lithium pyrrolidinoborohydride. A facile conversion of α, β-unsaturated aldehydes and ketones to the corresponding allylic alcohols in high purity
作者:Joseph C. Fuller、Eric L. Stangeland、Christian T. Goralski、Bakthan Singaram
DOI:10.1016/s0040-4039(00)60561-0
日期:1993.1
reducing agents for the reduction α, β-unsaturated aldehydes and ketones to the corresponding allylic alcohols. Thus, lithium pyrrolidinoborohydride (LiPyrrBH3) and reduces cinnamaldehyde and cyclohexenone to give exclusively cinnamyl alcohol and 2-cyclohexen-1-ol respectively. This 1, 2-reduction appears to be general and ester groups are tolerated. The yield of allylic alcohols from this procedure is essentially
通过n-BuLi与胺-硼烷反应制得的氨基硼氢化锂(LiABH 3)是有效的还原剂,可将α,β-不饱和醛和酮还原为相应的烯丙基醇。因此,吡咯烷硼氢化锂(LiPyrrBH 3)还原肉桂醛和环己烯酮,分别分别生成肉桂醇和2-环己烯-1-醇。这种1,2-还原似乎是普遍的,并且酯基是可容忍的。从该方法得到的烯丙基醇的产率基本上是定量的。