作者:Huai-Ri Sun、Qingyang Zhao、Hui Yang、Sen Yang、Bo-Bo Gou、Jie Chen、Ling Zhou
DOI:10.1021/acs.orglett.9b02714
日期:2019.9.6
Asymmetric Prins cyclization of in situ generated quinone methides and o-aminobenzaldehyde has been developed with chiral phosphoric acid as an efficient catalyst. This unconventional method provides a facile access to diverse functionalized trans-fused pyrano-/furo-tetrahydroquinoline derivatives in excellent yield and with excellent diastereo- and enantioselectivities (up to 99% yield and 99% ee)
已经开发了以手性磷酸为有效催化剂的原位生成的醌甲基化物和邻氨基苯甲醛的不对称Prins环化反应。这种非常规的方法可以轻松获得各种功能化的反式吡喃//呋喃-四氢喹啉衍生物,且产率高,非对映和对映选择性(产率高达99%,ee高达99%)。力学研究表明,三个相邻的三级立体中心是通过C–O,CC和C–N键的顺序形成而构建的。