efficient kinetic resolution of racemic secondary alkyl diazoacetates in intramolecular carbon-hydrogen insertion reactions has been achieved using chiral dirhodium(ii) carboxamidates. Products formed from catalytic diazo decomposition of racemic 2-octyl diazoacetate and, separately, its (2R)- and (2S)-enantiomeric forms, as well as bothcis- andtrans-2-methylcyclohexyl diazoacetates, have been systematically
使用手性二
铑 (ii) 甲酰胺酸酯在分子内碳氢插入反应中实现了外消旋仲烷基
重氮乙酸酯的高效动力学拆分。已经系统地评估了由外消旋 2-辛基
重氮乙酸酯的催化重氮分解及其 (2R)-和 (2S)-对映体形式以及顺式和反式 2-甲基环己基
重氮乙酸酯的催化重氮分解产物。γ-内酯形成的对映选择性高达 99%ee。已经观察到 β-内酯的产生,尽管重氮
乙酸环己酯的产生量很小,但它是
重氮乙酸 2-辛酯重氮分解的主要插入途径。