Thermal decomposition of the 3-phenyl-substituted 2H-azaphosphirene complex 1 in the presence of dimethyl cyanamide and dimethyl acetylenedicarboxylate (DMAD) yielded dimethylamino-substituted products, the 2H-1,2- azaphosphole complex 4b and the diastereoisomeric Δ3-1,3,2-oxazaphospholene complexes 5a,b; this represents the first example of 1,3-dipolar cycloaddition reactions of a nitrilium phosphane ylide complex that is generated in situ by transylidation.
3-苯基取代的 2H-氮杂
磷烯络合物 1 在二甲基
氰酰胺和
乙炔二
甲酸二甲酯 (
DMAD) 存在下热分解,产生
二甲氨基取代的产物,2H-1,2-氮杂
磷络合物 4b 和非对映异构体 Δ3-1,3 ,2-恶氮
磷烯配合物 5a,b;这是通过转移基化原位产生的硝基膦叶立德络合物的 1,3-偶极环加成反应的第一个例子。