Enantioselective Decarboxylative Alkylation of β-Keto Acids to <i>ortho</i>-Quinone Methides as Reactive Intermediates: Asymmetric Synthesis of 2,4-Diaryl-1-benzopyrans
作者:Hyun Jung Jeong、Dae Young Kim
DOI:10.1021/acs.orglett.8b00993
日期:2018.5.18
efficient asymmetric synthesis of 2,4-diaryl-1-benzopyrans via enantioselective decarboxylative alkylation of β-keto acids to o-QM intermediates, followed by sequential cyclization and dehydration, has been developed. The synthetically useful chiral 2,4-diaryl-1-benzopyran derivatives were obtained in moderate to high yields and high enantioselectivities through a one-pot, two-step sequence. This approach
通过β-酮酸的对映选择性脱羧烷基化为o - QM中间体,然后依次环化和脱水,开发了新颖而有效的不对称合成2,4-二芳基-1-苯并吡喃。合成有用的手性2,4-二芳基-1-苯并吡喃衍生物是通过一锅两步顺序以中等至高收率和高对映选择性获得的。这种方法为制备具有宽泛的官能团耐受性的手性2,4-二芳基-1-苯并吡喃衍生物提供了一种简便的方法。