Organocatalytic asymmetric one-pot sequential reaction: synthesis of highly substituted spirocyclohexanepyrazolones with six contiguous stereogenic carbons
作者:Ping Sun、Chang-Yu Meng、Feng Zhou、Xin-Sheng Li、Jian-Wu Xie
DOI:10.1016/j.tet.2014.10.038
日期:2014.12
An atom-economical synthesis of chiral polyfunctionalized spiropyrazolone derivatives based on the development of a new organocatalytic enantioselective one-pot sequential Michael/Michael/Aldol reaction of 1,3-dicarbonyl compounds with unsaturated pyrazolones and α,β-unsaturated aldehydes has been developed. The notable features of this one-pot sequential process include the generation of up to six
基于新的1,3-二羰基化合物与不饱和吡唑啉酮和α,β-不饱和醛类的有机催化对映选择性一锅顺序Michael / Michael / Aldol反应的开发,开发了一种手性多官能螺并吡咯烷酮衍生物的原子经济合成方法。这种一锅法连续过程的显着特征包括最多生成六个连续的立体碳中心,包括一个具有高对映选择性(高达95%ee)和出色的非对映选择性(> 99:1 dr)的四级立体中心和五个三级立体中心。