Methanesulfonic Acid → HCID 131723755, compound

Participants

Reaction Steps

To [(9-benzyl-3-chloro-9H-carbazol-4-yl)oxy]acetonitrile (0.292 g, 0.842 mmol) in THF (6 mL) is added borane-methyl sulfide complex (0.24 mL, 2.53 mmol). The mixture is stirred at 80° C. for 2.5 h and then allowed to cool. MeOH is carefully added to the residue until gas evolution ceased and then the mixture is concentrated under vacuum. MeOH addition/removal is repeated two more times and then MeOH-dichloromethane (about 2 mL each) is added, followed by several drops of conc. HCl. The mixture is stirred for about 15 min and then taken to dryness under vacuum. After partitioning with dichloromethane and aq. sodium bicarbonate and drying, the residue is chromatographed on silica gel (50 mL) using MeOH-dichloromethane (2/98 to 4/96) to give 0.206 g (70%) of 2-[(9-benzyl-3-chloro-9H-carbazol-4-yl)oxy]ethylamine. The methanesulfonate salt is prepared by dissolving 2-[(9-benzyl-3-chloro-9H-carbazol-4-yl)oxy]ethylamine in MeOH and dichloromethane and adding methanesulfonic acid (0.0581 g). The mixture is concentrated to dryness under vacuum and the residue is crystallized from dichloromethane-hexane to give 0.206 g of 2-[(9-benzyl-3-chloro-9H-carbazol-4-yl)oxy]ethylamine, methanesulfonate salt as a white crystalline solid. 1H NMR (CDCl3) δ1.9, 3.29, 4.31, 5.49, 7.07, 7.12, 7.27, 7.35-7.49, 8.32.

Provenance & Evidence