small amount of water present in the solvent. Treatment of 4 with 3-methyl-1-p-tolyltriazine (TMT) gave methyl ester 5, which was also produced by dissolving 3 in methanol and dimethyl sulfoxide. Brief treatment of 3 with morpholine produced the morpholine amide 6. ...
![3,10-Dichloro-5H,12H-quinazolino[3,2-a][3,1]benzoxazine-5,12-dione Structure](https://image.chemsrc.com/caspic/021/59187-49-4.png)