Methylamine → Ro 22-9194

Participants

Reaction Steps

To a solution of 45.0 g of rac-2,3-dihydro-N-(2,6-dimethylphenyl)-alpha-methyl-1,3-dioxo-N-[3-(3-pyridinyl) -propyl]-1H-isoindole-2-acetamide hydrochloride dissolved in 200 ml of dimethylformamide was added 100 ml of 40% aqueous methylamine. The reaction mixture was stirred overnight, diluted with water, and extracted twice with dichloromethane. The combined organic layers were washed with water, dried with potassium carbonate, and evaporated to give an oil. The oil was converted to the dihydrochloride salt and crystallized from methanol ether to give 23.25 g of rac.-2-amino-N-(2,6-dimethylphenyl)-N-[3-(3-pyridinyl) -propyl]propanamide dihydrochloride, mp 256°-260° C. The mother liquors afforded an additional 4.9 g, mp 256°-259° C.

Provenance & Evidence