Diisopropylethylamine → 2-Phenyl-5,6-dihydro-1,2,4-triazolo[4,3-c]quinazolin-3-one

Participants

Reaction Steps

A mixture of 5-chloro-2-phenyl-1,2,4triazolo[4,3-c]-quinazolin-3-one (1g, 3.4 mmol), N,N-diisopropylethylamine (1 ml, 6.7 mmol) and 10% Pd-C (200 mg) in ethanol was shaken under hydrogen at 50 psi overnight. The reaction was diluted with CHCl3 and filtered through Celite. The filtrate was evaporated under reduced pressure and the residue dissolved in dichloromethane. The solution was washed with water, dried over Na2SO4 and evaporated under reduced pressure to yield 2-phenyl-5,6-dihydro-1,2,4-triazolo[4,3-c]quinazolin-3-one (Compound 2) as a white solid. m.p. 202-204° C.

Provenance & Evidence