Dimethylamine, hydrochloride → 3-(2-(4-Dimethylaminomethyl-benzyl)-4-methyl-1-oxo-1,2-dihydro-isoquinolin-6-yl)-4-methyl-benzoic acid, methyl ester

Participants

Reaction Steps

A solution of the product of Example 93 step ii) in DMF (10 mL) was treated with 60% sodium hydride in mineral oil (0.12 g) and the mixture was stirred at room temperature under a nitrogen atmosphere for 20 mins before the addition of 1,4-di(chloromethyl)benzene (0.74 g). After stirring for a further 20 mins the reaction was treated with dimethylamine hydrochloride (0.98 g), followed by triethylamine (5 mL). Stirring was continued for 16 hours before being diluted with ethyl acetate (150 mL) and washing with water (150 mL). The organic layer was dried with anhydrous sodium sulphate and concentrated in vacuo to give a brown oil, which was purified (SiO2, eluting with ethyl acetate containing 2.5% MeOH and 0.25% triethylamine) to give the sub-titled compound (0.25 g).

Provenance & Evidence