Organocatalytic Enantioselective (4+2) Annulation of Cyclopropane Carbaldehydes with 2‐Mercapto‐1‐Arylethanones
作者:Neeraj Yadav、Arijit Hazra、Priyanka Singh、Prabal Banerjee
DOI:10.1002/adsc.202301187
日期:2024.3.8
Here, we report the organocatalytic enantioselective synthesis of dihydrothiopyran derivatives from trans racemic donor-acceptor cyclopropane carbaldehydes (DACCs) and 2-mercapto-1-arylethanone via formal thio (4+2) cycloaddition involving thia-Michael aldol condensation and annulation. Mechanistic studies indicate a typical kinetic resolution (KR) is involved in this transformation, which results
在这里,我们报道了从反式外消旋供体-受体环丙烷甲醛(DACC)和2-巯基-1-芳基乙酮,通过涉及硫杂-迈克尔羟醛缩合和环化的正式硫代(4+2)环加成,有机催化对映选择性合成二氢噻喃衍生物。机理研究表明,这种转化涉及典型的动力学拆分 (KR),从而产生中等的产率和对映体比率。值得注意的是,该方法的特点是一锅法简单、反应条件温和、对空气和水分干扰的抵抗力强。