Aluminium lithium hydride → N-(4-(4-(Ethylheptylamino)butyl)phenyl)methanesulfonamide

Beteiligte Stoffe

Reaktionsschritte

A suspension of 1.8 g (0.047 mol) of lithium aluminum hydride in 50 ml of tetrahydrofuran (THF), under nitrogen, is cooled in an ice bath. The mixture is treated with a solution of N-[4-[4-(ethylheptylamino)-4-oxobutyl]phenyl]methanesulfonamide from Preparation 25 (7.5 g, 0.0195 mol) (which has been dried by azeotrope with CCl4 and then benzene) in 100 ml of THF dropwise over 45 min. The mixture is stirred for 30 min in the cold and for 2 hrs at ambient temperature. The mixture is cooled in an ice bath and treated cautiously, dropwise, with 100 ml of saturated aqueous sodium potassium tartrate. The resultant suspension is extracted with EtOAc (3×500 ml, 2×300 ml). The pooled extract is washed with brine, dried (Na2SO4) and concentrated to give 6.67 g of a crude oil. The oil is chromatographed over 1500 ml of silica gel eluting with 0.5% NH4OH--5% MeOH/CHCl 3. Forty-five ml fractions are collected with fractions at approximately 85-136 giving the title compound.

Herkunft & Nachweise