4-Nitrophenyl benzo[d]thiazol-2-ylcarbamate → Methyl 6-(1-(benzo[d]thiazol-2-ylcarbamoyl)-1,2,3,4-tetrahydroquinolin-7-yl)-3-(2-phenoxyethoxy)picolinate

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Reaction Steps

Methyl 3-(2-phenoxyethoxy)-6-(1,2,3,4-tetrahydroquinolin-7-yl)picolinate (27C) (81 mg, 0.2 mmol) and 4-nitrophenyl benzo[d]thiazol-2-ylcarbamate (19) (127 mg, 0.4 mmol) were heated to reflux in acetonitrile (5 mL) for 24 hours. After cooling, the mixture was concentrated under reduced pressure and purified by column chromatography on silica gel eluting with a gradient of PE (100%) to PE/EtOAc (4:6), to provide 114 mg (97%) of the desired product methyl 6-(1-(benzo[d]thiazol-2-ylcarbamoyl)-1,2,3,4-tetrahydroquinolin-7-yl)-3-(2-phenoxyethoxy)picolinate (27D). 1H NMR (300 MHz, CDCl3) δ8.12 (1H, s), 7.85 (1H, d), 7.73 (1H, m), 7.44 (3H, m), 7.29 (4H, m), 7.09 (1H, m), 6.94 (3H, m), 4.44 (2H, m), 4.37 (2H, m), 3.88 (2H, m), 3.78 (3H, m), 2.74 (2H, m), 2.00 (2H, m).

Provenance & Evidence