The 1,3-dipolar cycloadditions of 2,2-difluoromethylenecyclopropane with diazoalkanes and the deazetation of the pyrazoline adducts
作者:William R. Dolbier、Mark J. Seabury
DOI:10.1016/s0040-4020(01)81648-3
日期:——
2,2-Difluoromethylenecyclopropane was found to be a reactive dipolarophile in its reactions with three diazoalkanes. The thermal deazetations of the resultant pyrazoline adducts, while feasible, were not able to be carried out efficiently.
Cyclopropane chemistry. Part 5 [1,2]. Hexafluorocyclopropane as a source of difluorocarbene
作者:J.Michael Birchall、Roy Fields、Robert N. Haszeldine、Reginald J. McLean
DOI:10.1016/s0022-1139(00)85225-2
日期:1980.6
yields of the corresponding 1,1-difluorocyclopropanes, formed by addition of difluorocarbene to the olefin. The tetrafluoroethylene formed dimerises to octafluorocyclobutane, co-dimerises with the olefin, or survives, depending on the reaction conditions. With allene, hexafluorocyclopropane gives 1-(difluoromethylene)cyclopropane, 2,2,3,3-tetrafluorospiropentane, and products derived from tetrafluoroethylene