Trifluoroethoxy group as a leaving group for regioselective sequential substitution reactions of 5-trifluoromethylpyrimidine derivative with heteroatom nucleophiles

Add time:07/12/2019    Source:sciencedirect.com

Highly regioselective substitution reaction of 2,4-bis(2,2,2-trifluoroethoxy)-5-(trifluoromethyl)pyrimidine (TFEFP) with aniline derivatives smoothly proceeded firstly at the 2-postion. For the subsequent nucleophilic substitution at the 4-position with alkoxides, trifluoroethoxy group at the 4-position serves as a practically efficient leaving group.

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