Regioselective reactions of β-aminovinyl trifluoromethyl ketones with tosyl isocyanate
作者:Natalie V Lyutenko、Igor I Gerus、Alexey D Kacharov、Valery P Kukhar
DOI:10.1016/s0040-4020(03)00106-6
日期:2003.3
The NH- and α-CH-insertion reactions of tosyl isocyanate with N-monosubstituted and N,N-disubstituted trifluoromethyl-containing enaminones have been studied. The regioselectivity of N-tosylcarbomoylation of N-monosubstituted β-aminovinyl trifluoromethyl ketones depends on the structure of enaminones, the reaction temperature, the nature of solvent and catalyst. The Z configuration of fluorinated vinylogous
甲苯磺酰基异氰酸酯与所述的NH-和α-CH-插入反应Ñ单取代的和Ñ,Ñ含三氟甲基-二取代的烯胺酮进行了研究。N-单取代的β-氨基乙烯基三氟甲基酮的N-甲苯磺酰基羰基化的区域选择性取决于烯胺酮的结构,反应温度,溶剂和催化剂的性质。通过X射线分析推导了氟化乙烯基磺酰脲3e的Z构型。N,N-二取代烯胺5a的反应用甲苯磺酰基异氰酸酯与α-CH-或COCF 3基团的氧原子发生亲电反应的产物混合物,即磺酰脲6a和甲苯磺酰胺7a的乙烯基。