Hydrochloric Acid → 7-methoxy-6-nitroquinazolin-4(3H)-one

Participants

Reaction Steps

7-fluoro-6-nitroquinazolin-4(3H)-one (60 g, 287 mmol) in <Step 3> of Example 3 was dissolved in DMSO (600 mL) and sodium methoxide (46.5 g, 861 mmol) was added dropwise thereto in an ice water bath. Thirty minutes later, KOTMS (147 g, 1150 mmol) was added slowly to the water bath, and the mixture was subjected to a reaction for one day. Then, the mixture was neutralized with a 2N HCl solution. Subsequently, the solid thus obtained was filtered and dried to obtain the title compound (48 g, 76%).

Provenance & Evidence