N-BOC-ethylenediamine → 2-[2-(N-tert-butoxycarbonylamino)ethyl]-5-[[2-(N-tert-butoxycarbonylamino)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 of Example 3 (0.535 g) and N-(tert-butoxycarbonyl)ethylenediamine (prepared according to Synt. Comm., 20, 2559, (1990); 1.12 g) in dry pyridine (5.35 mL) is heated at 80° C. The dark solution obtained is held at this temperature for 5 hours, then it is concentrated to dryness and partitioned between brine (30 mL) and ethyl acetate (2×25 mL). The orange-red solid insoluble in the biphasic mixture is separated by suction filtration and dried at 40° C. under vacuum (0.43 g).

Provenance & Evidence