Efficient Pd-Catalyzed Regio- and Stereoselective Carboxylation of Allylic Alcohols with Formic Acid
作者:Ming-Chen Fu、Rui Shang、Wan-Min Cheng、Yao Fu
DOI:10.1002/chem.201701971
日期:2017.7.3
Formic acid is efficiently used as a C1 source to directly carboxylate allylic alcohols in the presence of a low loading of palladium catalyst and acetic anhydride as additive to afford β,γ‐unsaturated carboxylic acids with excellent chemo‐, regio‐, and stereoselectivity. The reaction proceeds through a carbonylation process with in situ‐generated carbon monoxide under mild conditions, avoiding the
在少量负载的钯催化剂和乙酸酐作为添加剂的情况下,甲酸可有效地用作C1来源,直接将烯丙醇羧化,从而获得具有出色的化学,区域和立体选择性的β,γ-不饱和羧酸。反应在温和条件下与原位生成的一氧化碳通过羰基化过程进行,避免使用高压气态CO。咬合角大的双膦配体(4,5-双di diphenylphosphino} -9,9-发现二甲基黄嘌呤,Xantphos对这种转化是唯一有效的。该反应的区域和立体收敛归因于在钯催化剂存在下烯丙基亲电子试剂的热力学上有利的异构化。