Acetic Anhydride → Benzyl 4-{6-[(acetylamino)methyl]-3-(3,4-dimethoxybenzyl)-2,4-dioxo-3,4-dihydroquinazolin-1(2H)-yl}piperidine-1-carboxylate

Participants

Reaction Steps

0.049 g of acetic anhydride is added to a solution of 0.09 g of benzyl 4-[6-(aminomethyl)-3-(3,4-dimethoxybenzyl)-2,4-dioxo-3,4-dihydroquinazolin-1(2H)-yl]piperidine-1-carboxylate obtained in stage 5.5 and 0.09 ml of NEt3 in 3 ml of DCM and the mixture is stirred at AT for 1 h 00. DCM is added and the solution is washed with a saturated NH4Cl solution, then with a 1N HCl solution, then with a 2N NaOH solution and then with water. The organic phase is dried over Na2SO4 and filtered, and the filtrate is evaporated under reduced pressure to give 0.104 g of the expected product.

Provenance & Evidence