HCID 23433475, compound → HCID 23433648, compound

Participants

Reaction Steps

A solution of 7-nitro-1,2,3,4-tetrahydro-4-methylquinoline (36 mg, 0.172 mmol) in ethyl acetate (3 mL) was hydrogenated under an atmosphere of hydrogen with 10% Pd/C (4 mg) at rt for 2 h. Filtration over Celite™ afforded 26 mg (85%) of 7-amino-1,2,3,4-tetrahydro-4-methylquinoline (structure 61A of Scheme XLVIII, where R1-3 =H, R4 =methyl) that was used without further purification for the next step. The title compound was prepared by General Method 13 (EXAMPLE 147) from 7-amino-1,2,3,4-tetrahydro-4-methylquinoline (26 mg, 0.145 mmol), ZnCl2 (30 mg, 0.218 mmol) and ethyl 4,4,4-trifluoroacetoacetate (21 mL, 0.145 mol) to afford 0.8 mg (2%) of 1,2,3,4-tetrahydro-4-methyl-6-trifluoromethyl-8-pyridono[5,6-g]quinoline (Compound 425). Data for Compound 425: 1H NMR (400 MHz, DMSO-d6) 11.65 (bs, 1 H), 7.20 (s, 1 H), 6.96 (s, 1 H), 6.37 (s, 2 H), 3.25 (m, 2 H), 2.90 (m, 1 H), 1.84 (m, 1 H), 1.59 (m, 1 H), 1.20 (d, J=6.9, 3 H).

Provenance & Evidence