N,N-Dimethylethylenediamine → 2-[2-(N-tert-butoxycarbonylamino)ethyl]-5-[[2-(dimethylamino)ethyl]amino]isoquino[8,7,6-cd]indazole-6(2H)-one

Participants

Reaction Conditions

Reaction Steps

A suspension of 2-[2-(N-tert-butoxycarbonylamino)ethyl]-5-(p-toluenesulfonyloxy)isoquino[8,7,6-cd]indazole-6(2H)-one (0.056 g) and 2-(dimethylamino) ethylamine (0.080 mL) in dry pyridine (0.50 mL) is heated at 80° C. The dark solution obtained is held at this temperature for 1 hour, then it is left at room temperature overnight. The dark precipitate obtained is separated by suction and purified by column chromatography (SiO2 ; eluant ethyl acetate and then methylene chloride/methanol 9/0.5 v/v) to give 2-[2-(N-tert-butoxycarbonylamino)ethyl]-5-[[2-(dimethylamino)ethyl]amino]isoquino[8,7,6-cd]indazole-6(2H)-one (0.024 g) as a red-orange solid.

Provenance & Evidence