Synthesis and reactivity of some 3,4-dibromo-2H-[1]benzopyrans: The generation and reactions of 3,4-didehydro-2H-[1]benzopyran
作者:Christopher D. Gabbutt、John D. Hepworth、B.Mark Heron、Md.Moshfiqur Rahman、Simon J. Coles、Michael B. Hursthouse
DOI:10.1016/s0040-4020(99)00571-2
日期:1999.8
Reaction of 3,4-dibromo-2,2,6,8-tetramethyl-2H-[1]benzopyran with either organolithium reagents or magnesium generates the novel strained alkyne, 3,4-didehydro-2H-[1]benzopyran. Cycloaddition with furans gives access to the dibenzo[b,d]pyran system.
3,4-二溴-2,2,6,8-四甲基-2 H- [1]苯并吡喃与有机锂试剂或镁的反应生成新的应变炔烃,3,4-didehydro-2 H- [1]苯并吡喃。与呋喃的环加成反应可以进入二苯并[ b,d ]吡喃系统。