C-acylation of pyrazole and its derivatives byo-chlorobenzenesulfonylisocyanate
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N-Substituted pyrazoles with a free 4-position on the ring and not containing electron-acceptor substituents easily react with o-chlorobenzenesulfonylisocyanate according to an electrophilic substitution scheme, forming 4-o-chlorobenzenesulfonylcarbamoyl derivatives.
KeywordsOrganic Chemistry Pyrazole Electrophilic Substitution Substitution Scheme
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