Ka. Suri et al., A SINGLE-STEP PROCEDURE FOR SYNTHESIS OF 2,4- AND 2,3,4-SUBSTITUTED 3,4-DIHYDROQUINAZOLINES, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 32(11), 1993, pp. 1171-1172
Substituted 3, 4-dihydroquinazolines have been synthesized in 80-85% y
ields by interaction of N-acylated o-aminoacetophenone/o-aminobenzophe
none with formamide or N-methylformamide in 85% formic acid.