M. Kawase, Hiromi Koiwai, A. Yamano
Feb 12, 1998
Citations
0
Influential Citations
11
Citations
Journal
Tetrahedron Letters
Abstract
Abstract 6-Trifluoromethyl-1,2,4-triazines ( 2 ), 3-trifluoromethyl-5-pyrazolones ( 3 ), or 5-trifluoromethyl-3-hydroxypyrazoles ( 4 ) are selectively btained in good yields through the regioselective attack of phenylhydrazine on mesoionic 4-trifluoroacetyl-1,3-oxazolium-5-olates ( 1 ), depending on the nature of the reaction solvent and temperature.