Trifluoroacetic acid → Benzyl 4-[6-(aminomethyl)-3-(3,4-dimethoxybenzyl)-2,4-dioxo-3,4-dihydroquinazolin-1(2H)-yl]piperidine-1-carboxylate

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Reaction Steps

A solution of 0.102 g of benzyl 4-[3-(3,4-dimethoxybenzyl)-6-({[(1,1-dimethylethoxy)carbonyl]amino}methyl)-2,4-dioxo-3,4-dihydroquinazolin-1(2H)-yl]piperidine-1-carboxylate obtained in stage 5.4 and 0.5 ml of TFA in 9.5 ml of DCM is stirred at AT for 2 h 00. A saturated NaHCO3 solution is added. The organic phase is dried over Na2SO4 and filtered, and the filtrate is evaporated under reduced pressure to give 0.09 g of the expected product.

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