Complementary Electrocyclic Reactions of<i>o</i>-Quinodimethanes. Highly Efficient Access to 4-Alkylideneisochroman-3-ones and 1-Carbomethoxy-3,4-dihydronaphthalenes
作者:Kozo Shishido、Hironori Komatsu、Keiichiro Fukumoto、Tetsuji Kametani
DOI:10.1246/cl.1987.2117
日期:1987.11.5
Thermolysis of 1-alkenylbenzocyclobutenyl-1-carboxylic acid produced 4-alkylideneisochroman-3-ones in good yields via an unprecedented tandem electrocyclic-[1,5]sigmatropic process of o-quinodimethane. Alternatively, thermolysis of the corresponding methyl ester afforded the dihydronaphthalenes via E-transition state in excellent yields.
1-烯基苯并环丁烯基-1-羧酸的热解通过前所未有的邻醌二甲烷串联电环-[1,5] sigmatropic 过程以良好的产率生产了4-亚烷基异色满-3-酮。或者,相应的甲酯的热解通过 E-过渡态以极好的收率提供二氢萘。