作者:Wang, Shuzhong、Zheng, Nuowen、Deji, Cuo、Hu, Qingzhong、Wu, Xinxin、Zhan, Ruoting、Huang, Huicai、Zhang, Yue
DOI:10.1021/acs.orglett.4c01470
日期:——
alkylamines. The elusive enamine precursors are generated under mild conditions by photoredox catalysis, efficiently annulated by the diene, and simultaneously functionalized with two aliphatic C(sp3)–H bonds, resulting in the productive synthesis of new aromatic rings. The aromatic ring construction provides direct access to 2-hydroxybenzophenone derivatives in high yields (up to 90%). This [4π + 2σ]
在此,可见光促进的二烯和烷基胺的[4π + 2σ]成环是通过烷基胺的双C(sp 3 )–H键功能化实现的。难以捉摸的烯胺前体在温和的条件下通过光氧化还原催化生成,被二烯有效地成环,并同时用两个脂肪族 C(sp 3 )–H 键进行官能化,从而高效合成新的芳环。芳环结构可直接以高产率(高达 90%)获得 2-羟基二苯甲酮衍生物。该[4π+2σ]环化反应反应条件温和,反应效率高,具有广泛的官能团耐受性,该合成方案已可用于天然产物和商业药物的后期转化。