An improved synthesis of the bis-methylamido Hantzsch dihydropyridine is described. The Hantzsch amide is demonstrated to be an effective transfer hydrogenation reagent using α,β-unsaturated ketones as the test case. Unreacted Hantzsch amide and the bis-methylamidopyridine byproduct are effectively removed by extraction in contrast to the commonly used Hantzsch diethyl ester. Several examples are given
描述了双甲基酰胺基汉茨
二氢吡啶的改进的合成。Hantzsch酰胺被证明是一种有效的转移氢化试剂,使用α,β-不饱和酮作为测试案例。与常用的汉茨二
乙酯相反,未反应的汉茨酰胺和双甲基酰胺基
吡啶副产物可通过萃取有效去除。给出了几个实例,其中该反应对共轭芳族底物比对脂族底物更有效。