Intramolecular Pictet-Spengler reaction of Nb-Alkoxytryptamines. 4. A study towards diastereocontrol in the synthesis of tetracyclic eudistomins
作者:Jan H. van Maarseveen、Hans W. Scheeren、Chris G. Kruse
DOI:10.1016/s0040-4020(01)80376-8
日期:1993.3
methylated derivative was also synthesized giving the interesting cis/trans pentacyclic spiro compounds 19 and 20. These results are interpreted in terms of a kinetically favoured electrophilic attack at the indole-3 position, whereas β-carboline formation is the result of a slower route via electrophilic attack at the indole-2 position.