Tandem-Directed Regioselective Hydroformylation/β-Elimination: A Practical Method for the Synthesis of Enals
作者:Bernhard Breit、Achim Bruch、Antje Gebert
DOI:10.1055/s-2008-1067140
日期:2008.7
A practical synthesis of α,β-unsaturated aldehydes by a tandem-directed hydroformylation/β -elimination process of allylic o-DPPB esters is reported. The o-DPPB group served as an effective controller for regioselectivity of the hydroformylation towards the desired aldolate isomer, and was subsequently eliminated in situ by mild standard bases. The reaction is rather general for the preparation of
报道了通过烯丙基 o-DPPB 酯的串联定向加氢甲酰化/β-消除工艺实际合成 α,β-不饱和醛。o-DPPB 基团作为加氢甲酰化对所需醛醇异构体的区域选择性的有效控制剂,随后被温和的标准碱原位消除。该反应对于制备 1,1-二取代和三取代烯醛是相当普遍的,并且与许多官能团相容。o-DPPBA 可以通过色谱法或以二乙基铵盐的形式沉淀来回收。