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中度活泼的叶立德(Ylid),二苯基烃基烯丙磷烷,与α、β—不饱和醛的维惕希反应生成反式占优势的共轭多烯。
Moderately reactive Ylid, diphenyl alkylalkylphosphazene, and the Vital reaction with α, β-unsaturated aldehydes produce the trans-dominant conjugated polyene.