Chinese Journal of Organic Chemistry >
Chlorination of Anilide by Pd(OAc)2/N-Chloro-N-fluorobenzene- sulfonylamide
Received date: 2019-03-20
Revised date: 2019-04-25
Online published: 2019-05-10
Supported by
Project supported by the National Natural Science Foundation of China (No. 21372077) and the State Key Laboratory of Efficient Utilization for Low Grade Phosphate Rock and Its Associated Resources (No. WFKF2017-04).
A mild method for palladium-catalyzed halogenation of acetanilide with N-chloro-N-fluorobenzenesulfonylamide (CFBSA) as a chlorinating reagent, oxidant, and novel promoting reagent was achieved. The decomposition of byproduct N-fluoroben-zenesulfonylamine in the presence of Pd(OAc)2 could accelerate the process of chlorination. Preliminary mechanism investigation showed that Pd catalyzed anilide directed C-H activation lead to the ortho chlorination selectivity. A series of ortho-chlorinated anilides were obtained in 28%~82% yields.
Key words: chlorinating reagent; fluorine atom; Pd-catalyzed; synthetic methodology
Zhu Ye , Huang Jinwen , Yang Xianjin . Chlorination of Anilide by Pd(OAc)2/N-Chloro-N-fluorobenzene- sulfonylamide[J]. Chinese Journal of Organic Chemistry, 2019 , 39(6) : 1665 -1671 . DOI: 10.6023/cjoc201903037
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