Models of folate cofactors - 23. A synthetic strategy to the aspidosperma skeleton. Synthesis of the 21-epimer of 20-deethyl-3,17-dioxo-16-ethoxycarbonyl-1-methylaspidospermidine.
作者:R.H Huizenga、J van Wiltenburg、H Bieräugel、U.K Pandit
DOI:10.1016/s0040-4020(01)86453-x
日期:1991.1
late models and amines furnish enaminones. The enaminones react with acid chlorides to give enamidones, which can be cyclized by Lewis acids to 2-oxopyrrolo[2,3-d]carbazoles or 1′-carbonyl-pyrrolo[2,3-d]carbazoles. The influence of both the location of the amide carbonyl (in the enamidone) and the Lewis acids on the stereochemical outcome of the cyclization reaction is discussed. The approach has been