Cycloheptylamine → HCID 21897116, compound

Participants

Reaction Conditions

Reaction Steps

To cyanuric chloride (3.148 g, 17.0 mmol) dissolved in acetonitrile (70 mL) stirring at −20° C., was added a solution of 4-benzyloxy-3-chloro-phenylamine (4.0188 g, 17.0 mmol) in acetonitrile (40 mL) followed by the addition of diisopropylethylamine (DIEA) (3 mL, 17.0 mmol), and was stirred at −20° C. for 1 hour under a nitrogen atmosphere. The mixture was allowed to warm to room temperature and then cycloheptylamine (2.2 mL, 17.0 mmol) was added in anhydrous acetonitrile (5 mL) followed by addition of a DIEA (3.2 mL, 18.7 mmol), and the mixture was stirred at room temperature overnight. To this reaction mixture was added DIEA (3.2 mL, 18.7 mmol) followed by addition of N-methyl-4-(methylamino)piperidine (2.5 mL, 17.0 mmol) and was stirred and heated at reflux overnight. The reaction mixture was extracted 3 times with methylene chloride; the combined organic layers were washed one time with brine and dried over anhydrous potassium carbonate. The organic layer was concentrated in vacuo and dried overnight under vacuum. Column chromatography (90:9:1 v:v:v dichloromethane:methanol:ammonium hydroxide) yielded E2 (619 mg, 7%); mp 84° C.; HPLC: Inertsil ODS 3V C18, 40:30:30 [KH2PO4 (0.01 M, pH 3.2): CH3OH:CH3CN], 264 nm, Rt 37.1 min, 99.4% purity; MS (TOF ES+) m/z 550 (M+H, 100), 276 (M+2H, 34.9), 275.5 (83.9).

Provenance & Evidence