DOI: 10.1055/s-00000084

Synthesis

References

Heating at 70 °C is necessary to force the dehydration of the 5-hydroxy-5-trifluoromethylpyrazoline intermediate, see: Fustero S, Román R, Sanz-Cervera J.-F, Simón-Fuentes A, Cuñat AC, Villanova S, Murguía M.
J. Org. Chem. 2008;
73: 3523 ; and references herein

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