Enforced intramolecular hydrogen bonding facilitates
intramolecular general base catalysis in the acetylation of a family of
α,Ï-amino alcohols by acetylimidazole, and the site of
acetylation when there are two hydroxy groups is determined by the
relative ease of intramolecular hydrogen bonding rather than by
intermolecular steric effects.
在乙酰
咪唑对δ,Ï-
氨基醇家族进行乙酰化时,强制分子内氢键促进了分子内一般碱催化作用,当存在两个羟基时,乙酰化的部位是由分子内氢键的相对容易程度决定的,而不是由分子间立体效应决定的。