1-Hydroxybenzotriazole → 10,11-DIHYDRO-5-[1-(1-(4-PYRIDYL)METHYLCARBONYL)-4-PIPERIDYLIDENE]-5H-DIBENZO[a,d]CYCLOHEPTENE

Beteiligte Stoffe

Reaktionsschritte

Dissolve 0.15 g (0.6 m mole) of 10,11-dihydro-5-(4-piperidylidene)-5H-dibenzo[a,d]cycloheptene, 0.096 g (0.55 m mole) of 4-pyridylacetic acid hydrochloride, 0.16 g (0.83 m mole) of DEC and 0.075 g (0.55 m mole) of HOBT in 5 mL of DMF and stir at room temperature for 18 hours under nitrogen. Concentrate under vacuo and partition between 100 mL each of EtOAc and 10% aqueous sodium hydrogenphosphate. Dry the organic layer over MgSO4 and concentrate under vacuo. The resulting residue is chromatographed on silica gel using 98% dichloro methane and 2% MeOH, saturated with ammonia as the solvent, giving the product as a white waxy solid, mp=162.8-163.4° C.

Herkunft & Nachweise