作者:John D. Hepworth、Terry K. Jones、Robert Livingstone
DOI:10.1016/s0040-4020(01)98965-3
日期:1981.1
5-, 6-, 7-, and 8-Chloro-2,2-dimethylchromins have been prepared from the corresponding chloro-coumarin and their conversion into the 3,4-dihalogenochroman derivatives is described. The 4-halogen atom is shown to be the more susceptible to hydrolysis by conversion of the resulting halohydrins into chromanones and epoxides. The formation of bis-chromens during the dehalogenation of 3-halogenochromanones
已经从相应的氯香豆素制备了5-,6-,7-和8-氯-2,2-二甲基苯并二恶英,并描述了它们向3,4-二卤代苯并二氢吡喃衍生物的转化。通过将产生的卤代醇转化成苯并二氢吡喃酮和环氧化物,显示4-卤素原子更易于水解。据报道在3-卤代铬烷酮的脱卤过程中双铬的形成。