Chemical transformation of protoberberines. XII A novel synthesis of rhoeadine alkaloids. An alternative synthesis of a key intermediate, benzindenoazepine, for a synthesis of (.+-.)-cis-alpinigenine and (.+-.)-cis-alpinine from palmatine.
Chemical transformation of protoberberines. XII A novel synthesis of rhoeadine alkaloids. An alternative synthesis of a key intermediate, benzindenoazepine, for a synthesis of (.+-.)-cis-alpinigenine and (.+-.)-cis-alpinine from palmatine.
Total synthesis of the alkaloids (±)-alpinigenine and (±)-cis-alpinigenine
作者:Sundaresan Prabhakar、Ana M. Lobo、M. Regina Tavares、Ilda M. C. Oliveira
DOI:10.1039/p19810001273
日期:——
stereoselective synthesis of the rhoeadine alkaloid (±)-cis-alpinigenine is described. Hofmann elimination of the known tetracyclic base (4) gave the trans-azecine (7) which afforded the diol (13) on oxidation with N-bromo-succinimide. Periodic acid cleavage of (13) yielded the dibenzaldehyde (14), which on photolysis resulted in the formation of (±)-cis-alpinigenine (20–30%) and (±)-alpinigenine (1%) involving
Bremner, John B.; Browne, Elaine J.; Davies, Peter E., Australian Journal of Chemistry, 1980, vol. 33, # 6, p. 1335 - 1343
作者:Bremner, John B.、Browne, Elaine J.、Davies, Peter E.
DOI:——
日期:——
Chakravarti; Swaminathan, Journal of the Indian Chemical Society, 1934, vol. 11, p. 107,110
作者:Chakravarti、Swaminathan
DOI:——
日期:——
Spaeth; Mosettig, Justus Liebigs Annalen der Chemie, 1923, vol. 433, p. 140,145
作者:Spaeth、Mosettig
DOI:——
日期:——
61. A new synthesis of 3 : 11-dimethoxyoxyprotoberberine, and syntheses of 2 : 3-methylenedioxy-11 : 12-dimethoxyoxyprotoberberine and 2 : 3 : 11 : 12-tetramethoxyoxyprotoberberine