Water → HCID 178456605, compound

Participants

Reaction Steps

A mixture of 2-(3-allylureido)benzonitrile (10.0 g, 50 mmol) in ethanol (70 mL) and 28% of ammonia water (50 mL) was heated on a steam bath with occasional stirring for 15 minutes. The mixture was then cooled to room temperature and to the mixture was added water (100 mL). The solid was collected by filtration and was recrystallized from methanol with a few drops of ammonia water to give 8.4 g (84%) of 3,4-dihydro-4-imino-3-allyl-2(1H)-quinazolinone, mp 223°-224° C. IR (KBr): 3284, 3203, 3147, 1691, 1582 cm-1. 1H NMR (300 MHz, DMSO-d6): δ4.61 (d, 2H, =CH2), 5.08 (q, 2H, CH2), 5.85 (m, 1H, =CH), 7.07 (m, 2H, Ar--H), 7.46 (t, 1H, Ar--H), 8.04 (d, 1H, Ar--H), 8.85 (br s, 1H, NH), 10.74 (s, 1H, NH). 13C NMR (75 MHz, DMSO-d6): δ42.54, 115.08, 115.81, 122.09, 126.13, 132.77, 133.15, 137.01, 149.76. Anal. Calcd for C11H11N3O; C, 65.63; H, 5.56; N, 20.87. Found: C, 65.67; H, 5.51; N, 20.86.

Provenance & Evidence