Diisopropylethylamine → tert-Butyl 2-((3-methoxy-4-(4-methyl-1H-imidazol-1-yl)phenyl)amino)-6,7-dihydrothiazolo[5,4-c]pyridine-5(4H)-carboxylate

Participants

Reaction Steps

The title compound was prepared in analogy to example 1 step e) from 92 mg (0.33 mmol) 3-bromo-4-oxo-piperidine-1-carboxylic acid tert-butyl ester, 79 mg (0.3 mmol) [3-methoxy-4-(4-methyl-imidazol-1-yl)-phenyl]-thiourea and 43 mg (0.33 mmol) N,N-diisopropyl ethyl amine. The reaction was poured onto water and extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulphate, filtered and the solvent was evaporated in vacuo. The crude product was purified on silica gel with methylene chloride/methanol 19/1 yielding 99 mg (75%) 2-[3-methoxy-4-(4-methyl-imidazol-1-yl)-phenylamino]-6,7-dihydro-4H-thiazolo[5,4-c]pyridine-5-carboxylic acid tert-butyl ester as a light yellow foam. MS ISP (m/e): 442.3 (100) (M+H)+. 1H NMR (DMSO-D6, 250 MHz): δ (ppm)=10.32 (s, 1H), 7.64 (s, 1H), 7.47 (s, 1H), 7.31 (d, 1H), 7.25 (d, 1H), 7.02 (d, 1H), 4.43 (s, 2H), 3.78 (s, 3H), 3.64 (t, 2H), 2.63 (m, 2H), 2.14 (s, 3H), 1.43 (s, 9H).

Provenance & Evidence