作者:P. Canonne.、H. Caron、G. Foscolos
DOI:10.1016/s0040-4020(01)91475-9
日期:1984.1
4-dihydrocoumarin. A large difference in product distribution was observed between the two bifunctional reagents. Annelation was favored by the use of 1,4-bis(bromomagnesio))butane, whereas conjugate addition was observed with 1,5-bis(bromomagnesio)pentane and even In the use of 4-methylcoumarin.
1,4-双(溴镁)丁烷和1,5-双(溴镁)戊烷与香豆素和6-甲基香豆素的反应得到了1-(邻羟基苯乙烯基)环烷醇和4-烷基-3,4-二氢香豆素的混合物。在两种双功能试剂之间观察到产物分布的巨大差异。使用1,4-双(溴镁)丁烷有利于退火,而使用1,5-双(溴镁)戊烷甚至在使用4-甲基香豆素时观察到共轭加成。