To provide a process for increasing the proportion of an optical isomer of not only a compound having a closed ring but also a compound not having a closed ring when an optical isomer mixture of a compound having both a formyl group and a double bond capable of causing a carbonyl-ene ring closing reaction in the same molecule is subjected to a ring closing reaction. A process for increasing the proportion of an optical isomer characterized by subjecting an optical isomer mixture of a compound having both a formyl group and a double bond capable of causing a carbonyl-ene ring closing reaction in the same molecule to a ring closing reaction in the presence of a predetermined aluminum complex represented by the general formula: [Al2(L1)n(L2)3-n]m.
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机译:本发明提供一种在具有甲酰基和双键的化合物的旋光异构体的混合物中,不仅增加具有闭环的化合物的旋光异构体的比例,而且增加不具有闭环的化合物的旋光异构体的比例的方法。在同一分子中的羰基-烯的闭环反应进行闭环反应。一种增加旋光异构体比例的方法,其特征在于使具有甲酰基和双键的化合物的旋光异构体混合物能够在同一分子中进行羰基-烯烃的闭环反应,从而使该异构体混合。通式[Al 2 Sub>(L 1 Sup>) n Sub>(L 2 Sup >) 3-n Sub>] m Sub>。
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