Reaction of menthylmagnesium chloride with pyridine-2-carbaldehyde gives a mixture of four isomeric chiral menthyl- and neomenthyl-substituted pyridylcarbinols which were fully characterised by a combination of spectroscopic and X-ray crystallographic methods. All of these alcohols catalyse the addition of diethylzinc to benzaldehyde, but with disappointing enantioselectivities.
薄荷基
氯化镁与
吡啶-2-甲醛反应,得到四种异构手性薄荷基和
新薄荷基取代的
吡啶基
甲醇的混合物,并通过光谱和 X 射线晶体学方法的组合对其进行了充分表征。所有这些醇都催化
二乙基锌与
苯甲醛的加成,但对映选择性令人失望。