Ethanolysis of 1-aryl-5,7-di-t-butyl-2-phenylspiro[2.5]octa-1,4,7-trien-6-one 2 proceeds via a vinyl cation generated by opening of the cyclopropene ring, judging from regiospecific ring opening and kinetics (ρ+=−3.0, m= 0.53, and rate dependence on pH of the solvent).
1-芳基-5,7-二叔丁基-2-苯基螺[2.5]octa-1,4,7-trien-6-one 2 的
乙醇解通过环
丙烯环开环产生的
乙烯基阳离子进行,判断来自区域特异性开环和动力学(ρ+=-3.0,m=0.53,速率依赖于溶剂的 pH 值)。