Sonogashira偶联,Pd(II)催化的羰基环化和苯并呋喃还原(Mg,MeOH,NH 4 Cl)的序列为反式-2-芳基-2,3-二氢苯并[ b ]呋喃提供了一种收敛的模块化合成途径。-3-羧酸盐,是许多具有生物活性的天然产物的结构特征。这种多用途的策略适用于抗HIV天然产物(+)-紫精酸的正式全合成。
Transition-Metal-Free Synthesis of 2-Substituted Methyl Benzo[b]furan-3-carboxylates
摘要:
A concise and highly efficient synthetic pathway was developed for 2-substituted methyl benzo[b]furan-3-carboxylates. This method provides convenient and cost-effective access for 2-substituted methyl benzo[b]furan-3-carboxylates without the use of a transition metal catalyst for synthesis. Furthermore, in most cases, this method gives excellent yields and conventional flash column chromatography is not needed for purification.