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
Synthesis of vinca alkaloids and related compounds XLVII synthesis of (+)- and (-)-deethylcatharanthine
作者:Csaba Szántay、Hedvig Bölcskei、Gács-Baitz Eszter、Keve Tibor
DOI:10.1016/s0040-4020(01)81976-1
日期:1990.1
Synthesis of optically active deethylcatharanthine () was performed in a few steps. While studying various approaches and reaction conditions new rearrangements ( →→ and →) and new heterocyclic systems (e.g. ,,,) were discovered.
Free radical reactions initiated by organocobalt complexes. A new method for the degradation of carboxylic acids tofunctionalised nor-alkanes via acylcobalt salophen intermediates.
作者:Vinod F. Patel、Gerald Pattenden
DOI:10.1016/s0040-4039(00)80190-2
日期:——
Synthesis of 20-epipseudoaspidospermidine, 20-epidehydropseudoaspidospermidine, and 20-epipseudovincadifformine
作者:Ernest Wenkert、Barry Porter、Dana P. Simmons、Janick Ardisson、Nicole Kunesch、Jacques Poisson