Isopropylamine → 1-(3-bromophenyl)-N-isopropyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxamide

Participants

Reaction Conditions

Reaction Steps

To a suspension of 1-(3-bromophenyl)-1,4-dihydro[1,8]naphthyridin-4-one-3-carboxylic acid from Step 3 (1 eq) and triethylamine (3 eq) in tetrahydrofuran (0.08M) at 0° C. was added isobutyl chloroformate (1.8 eq). After stirring at 0° C. for 2 hours, isopropylamine (5 eq) was added and the mixture was allowed to warm up to room temperature and stirred overnight. The mixture was then partitioned between ethyl acetate and water, the organic phase was dried and evaporated to a solid which was stirred in ether at room temperature for 3 hours and filtered to afford the N-Isopropyl-1-(3-bromophenyl)-1,4-dihydro[1,8]naphthyridin-4-one-3-carboxamide as a white solid.

Provenance & Evidence