We herein describe a three-component reaction involving bicyclic amidines such as DBN/DBU, acyl fluorides, and TMSCF3 for access to a novel class of N-acyl trifluoromethylated bicyclic aminals. Under mild and operationally simple conditions, bicyclic amidines can undergo difunctionalization (acylation/trifluoromethylation) using readily available reagents. Further Lewis acid-promoted nucleophilic ring-opening
我们在此描述了涉及双环脒(例如 DBN/DBU、酰基氟和 TMSCF 3)的三组分反应,以获得一类新型N-酰基三氟甲基化双环缩醛胺。在温和且操作简单的条件下,双环脒可以使用现成的试剂进行双官能化(酰化/三氟甲基化)。路易斯酸进一步促进的亲核开环可以产生具有含有CF 3的季碳中心的多种产物。相应的五氟乙基化也可以通过使用TMSC 2 F 5来实现。
Photochemical Synthesis of Acyl Fluorides Using Copper-Catalyzed Fluorocarbonylation of Alkyl Iodides
作者:Pinku Tung、Neal P. Mankad
DOI:10.1021/acs.orglett.4c00967
日期:2024.4.19
reagents due to their unique balance between reactivity and stability. Here, we report a copper-catalyzed carbonylative coupling strategy for synthesizing acyl fluorides under photoirradiation. Alkyl iodides were transformed in high yields into acyl fluorides by using a commercially available copper precatalyst (CuBr·SMe2) and a readily available fluoride salt (KF) at ambient temperature and mild CO pressure