Water → 4-[2-(4-Methoxy-benzyl)-7-methyl-1-oxo-1,2-dihydro-isoquinolin-6-yloxy]-piperidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

A solution of 3.2 g (15.9 mmol) 1-tert-butoxycarbonyl-4-hydroxypiperidine in 110 mL dimethylacetamide was stirred with 1.36 g (45.4 mmol) of 80-% sodium hydride for 1 h at room temperature. Then a suspension of 4.5 g (15.1 mmol) of 6-fluoro-2-(4-methoxy-benzyl)-7-methyl-2H-isoquinolin-1-one in dimethylacetamide was added. The reaction mixture was heated to 80° C. for 2 h during which time a clear solution was obtained. The reaction mixture was slowly added to 160 mL water and after 1 h of stirring the product was isolated by filtration and dried over night in vacuum. 6.4 g of 4-[2-(4-Methoxy-benzyl)-7-methyl-1-oxo-1,2-dihydro-isoquinolin-6-yloxy]-piperidine-1-carboxylic acid tert-butyl ester were obtained.

Provenance & Evidence