Urea → 6,8-Dichloroquinazoline-2,4(1h,3h)-dione

Beteiligte Stoffe

Reaktionsschritte

Prepared according to general method C from 2-amino-3,5-dichlorobenzoic acid (3.0 g) and urea (8.8 g). Yield: 3.20 g (95%) of a solid. Although it contained a small amount of an impurity it was used in the next step without further purification. 1H-NMR (DMSO-δ6) δ (ppm) 10.13 (br s, 1H), 7.58 (d, J=2.5 Hz, 1H), 7.50 (d, J=2.6 Hz, 1H).

Herkunft & Nachweise