... e All c~impoiiiids were analyzed for C, 11, S. f .Id. ... Ciiem., 10, 129) AI. ... 2-Chloro-6,7-dimethoxy- 4(3H)-quinazolinone.-A mixture of 9,50 ml of 1 X NaOH, 300 ml of THF, and 41 g of 2,4-dichloro-6,7- dimethoxyquinazoline was stirred at room temperature under N2 for 4 hr. ...