Selective formation and reactivity of a stable carbocation formed from perfluorinated N,N′-dimethyl imidazolidine
作者:H. Bürger、R. Köplin、G. Pawelke
DOI:10.1016/s0022-1139(00)83166-8
日期:1984.4
-thione derivatives respectively. Selective halogen exchange in the 2-position is achieved by treatment of III with BCl3 and BBr3 to form the 2,2-dichloro and 2,2- dibromo derivatives. All compounds were characterised by NMR, IR, Raman and mass spectra.
1,3-双(三氟甲基)-2,2,2,4,4,5,5-六氟-咪唑烷(III)在SbF 5溶液中形成稳定的2-碳化。该阳离子与H 2 O和H 2 S反应,分别产生咪唑烷-2-酮和-硫酮衍生物。通过用BCl 3和BBr 3处理III以形成2,2-二氯和2,2-二溴衍生物,可以实现2-位的选择性卤素交换。所有化合物均通过NMR,IR,拉曼和质谱表征。