acid–activated N-acyl imidazoliums as versatile intermediates in carbonyl transformations. The efficient and scalable procedure was validated on a diverse set of carbamates, esters, amides, and unsymmetrical ureas (21 examples, up to 91% yield). Additionally, we exemplify this method on multikilogram scale for the synthesis of an electron-deficient carbamate.
我们报道了布朗斯台德酸活化的N-酰基
咪唑在羰基转化中作为通用
中间体的应用。在各种
氨基甲酸酯,
酯,
酰胺和不对称
脲上验证了有效且可扩展的程序(21个实例,产率高达91%)。此外,我们以多千克规模为例来说明这种方法,用于合成电子缺陷型
氨基甲酸酯。