反应详情

A solution of (5S)-3,9,10,11-tetramethoxy-6,7-dihydro-5H-dibenzo[a,c]cyclohepten-5-ylamine (0.329; 1 mmol) and 2-[di-(benzyloxy)phosphoryloxy]ethyl 4-nitrophenyl carbonate (0.633 g; 1.3 mmol) in acetonitrile (8 ml) was heated at 65° C., under argon atmosphere for 8 hours. After evaporation to dryness, the residue was purified by flash chromatography eluting with a 50-80% gradient of ethyl acetate/petroleum ether to give 2-[di(benzyloxy)phosphoryloxy]ethyl N-[(5S)-3,9,10,11-tetramethoxy-6,7-dihydro-5H-dibenzo[a,c]cyclohepten-5-yl]carbamate.

1. customAfter evaporation to dryness
2. customthe residue was purified by flash chromatography
3. washeluting with a 50-80% gradient of ethyl acetate/petroleum ether