Synthesis of new 4-benzoyl-5-hydroxy-3-trifluoromethylpyrazole derivatives via [1,3] rearrangements of benzoyl group using tert- butyllithium

Article abstract of DOI:10.1080/00397919808007030

The 4-benzoyl-3-trifluoromethyl-5-p-toluenesulfonyloxypyrazole derivatives (7a - c) were synthesized by a new procedure involving rearrangement of the benzoyl groups in 5-benzoyloxy-4-bromo-3- trifluoromethylpyrazole derivatives (5a - c) to 4-benzoyl-5-hy