Acetic Acid → HCID 16222359, compound

Participants

Reaction Steps

A mixture of 6-mercapto-2H-isoquinolin-1-one (50 mg, 0.28 mmol), 4-methane-sulphonyloxy-piperidine-1-carboxylic acid tert-butyl ester (117 mg, 0.42 mmol) and K2CO3 (64 mg, 0.46 mmol) in N, N-dimethylformamide (1.5 ml) was heated at 50° C. then left at ambient temperature overnight. Saturated aqueous sodium hydrogen carbonate was added to the mixture which was extracted with ethyl acetate (x 3). The combined organics were dried (Na2SO4) and concentrated in vacuo to give a residue. Flash chromatography of the residue using ethyl acetate:heptane (1:9 to 99:1) gave 4-(1-Oxo-1,2-dihydroisoquinolin-6-ylsulfanyl)piperidine-1-carboxylic acid tert-butyl ester (15 mg). A dichloromethane:trifluoroacetic acetic acid solution (7:3, 5 ml) was added to the 4-(1-Oxo-1,2-dihydroisoquinolin-6-ylsulfanyl)piperidine-1-carboxylic acid tert-butyl ester and the mixture stirred for 2 h, then concentrated in vacuo to give a residue. The residue was loaded onto a pre-acidified SCX column using methanol and eluted with 2M ammonia in methanol to afford crude 6-(piperidin-4-ylsulfanyl)-2H-isoquinolin-1-one, which was purified by prep-HPLC (2 mg), El-MS: m/z=261.1 [M+H]+.

Provenance & Evidence