Catalytic Amide–Base System of TMAF and N(TMS)<sub>3</sub> for Deprotonative Coupling of Benzylic C(sp<sup>3</sup>)–H Bonds with Carbonyls
作者:Masanori Shigeno、Kunihito Nakaji、Kanako Nozawa-Kumada、Yoshinori Kondo
DOI:10.1021/acs.orglett.9b00550
日期:2019.4.19
methylheteroarenes (2-methylbenzothiophene, 2-methylbenzofuran, and 2-, 3-, or 4-methylpyridines) are used as nucleophiles. Application to enamine synthesis using DMF as an electrophile is also shown. The present system is effective for toluenes (4-phenyl-, 4-bromo-, 2-bromo-, and 4-chlorotoluenes) having low reactivity.
本文描述了由四甲基氟化铵(TMAF)和N(TMS)3原位产生的酰胺基催化苄基C(sp 3)-H键与羰基的去质子偶联,形成对苯二甲酸酯。多种甲基杂芳烃(2-甲基苯并噻吩,2-甲基苯并呋喃和2-,3-或4-甲基吡啶)用作亲核试剂。还显示了使用DMF作为亲电试剂在烯胺合成中的应用。本系统对于具有低反应性的甲苯(4-苯基-,4-溴-,2-溴和4-氯甲苯)是有效的。