Diisopropylethylamine → N-[2-benzyloxy-5-[(1R)-1-hydroxy-2-(3-methoxy-6,7,8,9-tetrahydro-5H-benzocyclohepten-6-ylamino)ethyl]phenyl]methanesulfonamide

Participants

Reaction Steps

Under nitrogen, a solution of 3-methoxy-6,7,8,9-tetrahydro-5H-benzocyclohepten-6-ylamine (720 mg), N-[2-benzyloxy-5-[(1R)-2-iodo-1-(triethylsilyloxy)ethyl]phenyl]-methanesulfonamide (2.1 g) and N,N-diisopropylethylamine (2.6 ml) in N,N-dimethylacetamide (10 ml) was stirred at 110° C. for 96 hours. The resulting mixture was poured into aqueous 10% sodium hydrogensulfite and extracted with ethyl acetate. The organic layer was successively washed with saturated aqueous sodium hydrogencarbonate and brine, dried over anhydrous sodium sulfate and evaporated in vacuo. The residue was purified by column chromatography on silica gel (chloroform:methanol=40:1 to 20:1) to give N-[2-benzyloxy-5-[(1R)-1-hydroxy-2-(3-methoxy-6,7,8,9-tetrahydro-5H-benzocyclohepten-6-ylamino)ethyl]phenyl]methanesulfonamide (381 mg).

Provenance & Evidence