Sodium Hydroxide → 5-(4-(azetidin-3-yloxy)-3-methoxyphenyl)-2-(4-chlorophenyl)thiazolo[5,4-c]pyridin-4(5H)-one

Participants

Reaction Conditions

Reaction Steps

Dissolve 3-(4-{[2-(4-chloro-phenyl)-4-(2,2-dimethoxy-ethyl)-thiazole-5-carbonyl]-amino}-2-methoxy-phenoxy)-azetidine-1-carboxylic acid tert-butyl ester (18.9 g, 31.28 mmol) and p-toluenesulfonic acid monohydrate (19.7 g, 103.56 mmol) in dry toluene (460 mL) and stir mechanically at 95° C. overnight. Cool the reaction mixture and add 1 N NaOH. Stir the mixture vigorously at room temperature for one hour. Extract the aqueous layer with CH2Cl2 (2×700 mL). Combine the organic portions, wash with brine (700 mL), dry over MgSO4, and filter. Concentrate the filtrate in vacuo to give 13.0 g (85%) of 5-[4-(azetidin-3-yloxy)-3-methoxy-phenyl]-2-(4-chloro-phenyl)-5H-thiazolo[5,4-c]pyridin-4-one. ES/MS m/z 440.0 (35Cl) [M+1]+.

Provenance & Evidence