Synthesis of protopine. A novel conversion of the protoberberine alkaloid stylopine to a tetrahydrodibenz[<i>c,g</i>]azecine derivative
作者:B. K. Kulkarni、R. K. Dhar、N. J. De Souza
DOI:10.1002/jhet.5570270327
日期:1990.3
methiodide of the protoberberine alkaloid, stylopine, (3) with sodium hydride in dimethyl sulfoxide afforded in 70% yield the tetrahydrodibenz[c,g]azecine derivative 4, a key intermediate in the synthesis of protopine.