Benzothiazolium N-phenacylide adds to the cyclic double bond of methylenecyclopropenes having no acyl group on the 4-position to give stable [3 + 2] cycloadducts. This is the first example for the formation of stable [3 + 2] cycloadducts in the reaction of 1,3-dipoles with methylenecyclopropenes.
苯并噻唑鎓 N-苯甲酰化物与 4 位没有酰基的
亚甲基环丙烯的环状双键相加,得到稳定的 [3 + 2] 环加合物。这是在 1,3-偶极子与
亚甲基环丙烯的反应中形成稳定的 [3 + 2] 环加合物的第一个例子。