Synthesis of 6-(3-Aryl-2-propenyl)-2,3-dihydro-5-hydroxybenzofuran Derivatives by Cross Coupling Reactions
作者:Ramon J. Alabaster、Ian F. Cottrell、David Hands、Guy R. Humphrey、Derek J. Kennedy、Stanley H. B. Wright
DOI:10.1055/s-1989-27329
日期:——
The synthesis of 6-(3-aryl-2-propenyl)-2,3-dihydro-5-hydroxybenzofuran derivatives by cross coupling between 6-bromo-2,3-dihydro-benzofurans and cinnamyl halides via organo-metallic compounds has been explored. Palladium catalysed reaction between benzofurylzinc bromides and cinnamyl acetates gave high yields of pure products, and the reaction was developed into an economic process for the large scale preparation of 2,3-dihydro-5-hydroxy-6-[3-(2-hydroxymethylphenyl)-2-propenyl]benzofuran, a topical anti-inflammatory agent.
通过有机金属化合物,探索了6-溴-2,3-二氢苯并呋喃与肉桂基卤化物之间的交叉耦合反应,以合成6-(3-芳基-2-丙烯基)-2,3-二氢-5-羟基苯并呋喃衍生物。钯催化下,苯并呋喃锌溴化物与肉桂基乙酸酯的反应产生了高产率的纯产品,该反应已发展成经济的工艺,用于大规模制备2,3-二氢-5-羟基-6-[3-(2-羟甲基苯基)-2-丙烯基]苯并呋喃,这是一种外用抗炎剂。