A chiral diazo ester having a hydroxy group in the proper geometry produces an adduct with water up to 92% de upon treatment with a rhodium catalyst. This high stereoselectivity is attributable to the intramolecular hydrogen bond between the internal hydroxy group and the rhodium carbenoid.
一种具有适当几何结构的手性二氮酯,含有羟基,在经过
铑催化剂处理后,与
水反应生成的加成物可达到92%的去对映体过量。这种高立体选择性归因于内部羟基与
铑卡宾之间的分子内氢键。