Generation of heteroarylium-N-difluoromethylides and heteroaryl-N-difluoromethyl anions and their reactions with electrophiles: heteroaryl- and heteroarylium-N-difluoromethyl trimethylsilanes and a new heteroaryl-N-trifluoromethane
作者:German Bissky、Gerd-Volker Röschenthaler、Enno Lork、Jan Barten、Maurice Médebielle、Vasilij Staninets、Alexander A. Kolomeitsev
DOI:10.1016/s0022-1139(01)00390-6
日期:2001.7
1-bromodifluoromethyl-2-methyl-benzimidazole using tetrakis(dimethylamino)ethylene (TDAE) or tris(diethylamido)phosphite leads to new fluorinated carbanionic species, namely heteroarylium-N-difluoromethylides and heteroaryl-N-difluoromethyl anions. In the presence of electrophiles such as benzaldehyde, chlorodiphenylphosphine and chlorotrimethylsilane, the corresponding heteroarylium- and heteroaryl-N-difluoromethylated
N-溴二氟甲基-4-二甲基氨基吡啶溴化物,1-溴二氟甲基咪唑,1-甲基-3-溴二氟甲基咪唑鎓溴化物和1-溴二氟甲基-2-甲基苯并咪唑的还原脱溴反应使用四(二甲基氨基)乙烯(TDAE)或三(亚磷酸二乙基亚氨基酯可产生新的氟化碳负离子物质,即杂芳基-N-二氟甲基阴离子和杂芳基-N-二氟甲基阴离子。在亲电子试剂如苯甲醛,氯二苯基膦和氯三甲基硅烷的存在下,相应的杂芳基-和杂芳基-N-二氟甲基化的衍生物,咪唑-N-二氟甲基膦和-硅烷,2-甲基-苯并咪唑-N获得了-二氟甲基三甲基-羰基膦-膦和-硅烷。合成了类似的4-二甲基氨基吡啶鎓衍生物。