Sm. Murphy et Sp. Stanforth, REACTION OF 2-TRIFLUOROMETHYL-4H-3,1-BENZOXAZIN-4-ONE DERIVATIVES WITH CARBOETHOXYMETHYLENETRIPHENYLPHOSPHORANE, Journal of heterocyclic chemistry, 31(4), 1994, pp. 1083-1084
Treatment of a series of 2-trifluoromethyl-4H-3,1-benzoxazin-4-one der
ivatives 1 with carboethoxymethylenetriphenylphosphorane 2 yielded the
phosphoranes 3 in boiling toluene solution. Thermolysis of these phos
phoranes 3 gave esters 6.