HCID 57470253, compound → tert-Butyl 7-amino-4,4-dimethyl-3,4-dihydroquinoline-1(2H)-carboxylate

Participants

Reaction Steps

A mixture of 4,4-dimethyl-7-nitro-3,4-dihydro-2H-quinoline-1carboxylic acid tert-butyl ester (8.3 g, 0.03 mol) and Pd—C (0.5 g) in methanol (100 mL) was stirred under H2 (1 atm) at room temperature overnight. The catalyst was filtered off and the filtrate was concentrated. The residue was washed with petroleum ether to give tert-butyl 7-amino-3,4-dihydro-4,4-dimethylquinoline-1(2H)-carboxylate (DC-3) (7.2 g, 95%). 1H NMR (CDCl3) δ 7.11-7.04 (m, 2H), 6.45-6.38 (m, 1H), 3.71-3.67 (m, 2H), 3.50-3.28 (m, 2H), 1.71-1.67 (m, 2H), 1.51 (s, 9H), 1.24 (s, 6 H).

Provenance & Evidence