作者:Christopher D Gabbutt、David J Hartley、John D Hepworth、B.Mark Heron、Magan Kanjia、M.Moshfiqur Rahman
DOI:10.1016/s0040-4020(01)86967-2
日期:1994.2
synthesis of 4-bromo- 2H-chromenes and 2H-thiochromenes and of 1-bromo-3,4-dihydronaphthalene from the corresponding ketones and PBr3 is described. In some instances, significant quantities of the phosphonic acids (3) are isolated. Conversion of the bromo compounds to the lithio derivatives provides access to a wide range of novel 4-substituted 2H-chromenes and 2H-thiochromenes.
描述了由相应的酮和PBr 3容易地合成4-溴-2 H-色烯和2 H-硫代色烯以及1-溴-3,4-二氢萘。在某些情况下,分离出大量的膦酸(3)。溴化合物向硫代衍生物的转化提供了广泛的新颖的4-取代的2 H-色烯和2 H-硫代色烯的途径。