The synthesis of unsymmetric diamides through Rh-catalyzed selective C–H bond activation of amides with isocyanates

Literature Information

Publication Date 2017-02-08
DOI 10.1039/C6QO00793G
Impact Factor 5.281
Authors

Xiaoli Yu, Duo-Sheng Wang, Zhaojun Xu, Bobin Yang, Dawei Wang


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Abstract

Rh-catalyzed selective C–H bond activation was achieved with the assistance of non-coordinating anions. This methodology has been shown to excel as a means to selectively activate N-aryl rings for the synthesis of unsymmetric diamides, while the reaction could not occur without non-coordinating anions, which provides effective proof that non-coordinating anions play an important role in C–H bond activation. The results of mechanism experiments definitely eliminated the possibility of the “silver effect” in this silver-involving transformation. Importantly, this provided an efficient method for the synthesis of N-(4-iodo-2-(p-tolylcarbamoyl)phenyl)thiophene-2-carboxamide in an overall yield of 62% using just three steps, which exhibited promising activity against cancer-cell lines.

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Organic Chemistry Frontiers

Organic Chemistry Frontiers
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