Allylic Reactions of Benzocyclopropenes. Discrimination of halogen substituents in 1, 1-Dihalogenobenzocyclopropenes
作者:Paul Müller、Robert Etienne、Jean Pfyffer、Nelson Pineda、Michel Schipoff
DOI:10.1002/hlca.19780610719
日期:1978.11.1
Reaction of 1, 1-dichloro-2, 5-diphenylbenzocyclopropene (10a) with 1 equiv. of silver fluoride yields 1-chloro-1-fluoro-2, 5-diphenylbenzocyclopropene (10c). Both 10a and 10c react with excess silver fluoride to give the difluoro compound 10b. Both 10b and 10c are also prepared via cyclo-additions of 1, 2-dichloro-3, 3-difluorocyclopropene (14) or 1, 2, 3-flurocyclopropene (13) with diphenylbutadiene
1,1-二氯-2,5-二苯基苯并环丙烯(10a)与1当量的反应。氟化银的产率为1-氯-1-氟-2,5-二苯基苯并环丙烯(10c)。既10A和10C与氟化过量的银反应,得到二氟化合物10B。两个图10b和10c中还制备通过的环添加1,2二氯3,3-difluorocyclopropene(14)或1,2,3-flurocyclopropene(13)与二苯基丁二烯和随后的芳构化用碱。相似地。1-氯-1-氟苯并环丙烯(16)可从丁二烯和13获得。