... Sci., 69, 149 (1980). Page 4. 706 Journal of Medicinal Chemistry, 1982, Vol. 25, No. 6 stirring. ... To 32 mL of 1 M BH3/THF (Aldrich Chemical Co.) was added 1.77 g (0.008 mol) of 2-amino-6,7-dimethoxy-4(lZf)-quinazolinone (7a), followed by 48 mL of dry THF. ...