Asymmetric synthesis of six tetrahydroisoquinoline natural products through α-amination of an aldehyde
作者:Anas Ansari、Amol B. Gorde、Ramesh Ramapanicker
DOI:10.1016/j.tet.2021.132121
日期:2021.5
An enantioselective route towards the synthesis of C-1 substituted tetrahydroisoquinoline natural products is reported. Six different natural products are synthesized from a single aldehyde using proline-catalyzed asymmetric α-hydrazination reaction as the key step. The highly enantioselective introduction of an amino group is exploited to synthesize (−)-calycotomine, (−)-salsolidine, (−)-carnegine
报道了合成C-1取代的四氢异喹啉天然产物的对映选择性途径。以脯氨酸催化的不对称α-酰化反应为关键步骤,由单一醛合成六种不同的天然产物。利用氨基的高度对映选择性引入来合成(-)-花椰菜碱,(-)-沙丁胺碱,(-)-肉碱,(+)-高麦芽糖苷,(+)-高原小ber碱和(+)-crispineA。