Topological selectivity in the intramolecular [4 + 1] pyrroline annulation. Formal total stereospecific synthesis of (.+-.)-supinidine, (.+-.)-isoretronecanol, and (.+-.)-trachelanthamidine
Topological selectivity in the intramolecular [4 + 1] pyrroline annulation. Formal total stereospecific synthesis of (.+-.)-supinidine, (.+-.)-isoretronecanol, and (.+-.)-trachelanthamidine
作者:Tomas. Hudlicky、James O. Frazier、Gustavo. Seoane、Mark. Tiedje、Ana. Seoane、Lawrence D. Kwart、Chris. Beal
DOI:10.1021/ja00273a033
日期:1986.6
Intramolecular [4 + 1] pyrroline annulation approach to pyrrolizidine alkaloids. Formal total synthesis of (±)-supinidine.
作者:Tomas Hudlicky、James O Frazier、Lawrence D Kwart
DOI:10.1016/s0040-4039(00)89181-9
日期:1985.1
Dienic azide was found to yield dehydropyrrolizidines and on thermolysis. The synthesis of these compounds is described and the mechanistic implications as well as synthetic utility of this newannulation sequence is discussed.