Dichloromethane → HCID 22396774, compound

Participants

Reaction Steps

To a 25 mL scintillation vial containing a glass bead was added 4-cyanophenol (0.033 g, 0.277 mmol), a solution (0.250 M) of tert-butyl 10-(3-hydroxypropyl)-1,4,5,6-tetrahydroazepino[4,5-b]indole-3(2H)-carboxylate (1.0 mL, 0.250 mmol) in tetrahydrofuran, a solution (0.275 M) of triphenylphosphine (1.0 mL, 0.275 mmol) in tetrahydrofuran, and diethylazodicarboxylate (43.5 μl, 0.275 mmol). The vial was capped and orbitally shaken for 30 h. The mixture then was diluted with dichloromethane (1 mL) and methanol (1 mL). DOWEX® ion exchange resin (5.2 meq/gram, 0.5-0.75 g) was added and the mixtures were capped and shaken orbitally at 40° C. for 3 h. The mixture was filtered and the resin was washed (2× each) with dichloromethane, methanol, water, and tetrahydrofuran. The product then was eluted using a 4 N solution of ammonium hydroxide in methanol. Evaporation provided a residue which upon treatment with methanolic hydrochloric acid and evaporation led to the title compound.

Provenance & Evidence