作者:Maitane Fernández、Jose L. Vicario、Efraím Reyes、Luisa Carrillo、Dolores Badía
DOI:10.1039/c2cc17370k
日期:——
We have developed an efficient procedure for the easy and straightforward preparation of functionalized dihydropyridazines as highly enantiopure materials by reaction of pyruvaldehyde 2-tosyl hydrazone with a variety of α,β-unsaturated aldehydes using a chiral secondary amine as catalyst. The overall process consists of a cascade reaction involving an initial aza-Michael reaction, in which the stereocentre is installed, followed by an intramolecular aldol reaction/dehydration step.
我们开发了一种高效的方法,通过使用手性二级胺作为催化剂,将丙酮醛2-托磺酰肼与多种α,β-不饱和醛反应,简单而直接地制备功能化的二氢吡嗪,得到高度对映体纯的材料。整个过程包括一个级联反应,涉及初始的氮杂迈克尔反应,在这一过程中形成了立体中心,然后是一个分子内的醛醇反应/脱水步骤。