activities. Herein, heterocyclic compounds containing both a pyrazole motif and a masked amino acid structure are synthesized through the asymmetric Michael/aromatization of azlactones to α,β-unsaturated pyrazolones by using isosteviol-derived amine thiourea as the organocatalyst. The products are obtained in good yields (up to 93 %) with good diastereoselectivities and good enantioselectivities (up to >10:1 dr
吡唑是一类重要的分子结构,具有显着的
生物和药物活性。在此,通过使用
异甜菊醇衍生的胺
硫脲作为有机催化剂,通过吖内酯的不对称迈克尔/芳构化为 α,β-不饱和
吡唑啉酮合成含有
吡唑基序和掩蔽
氨基酸结构的
杂环化合物。产品以良好的收率(高达 93%)获得,具有良好的非对映选择性和良好的对映选择性(高达 >10:1 dr,97% ee)。