Intramolecular 1,3-diyl trapping reactions. Total synthesis of (.+-.)-hypnophilin and (.+-.)-coriolin. Formation of the trans-fused bicyclo[3.3.0]octane ring system
Intramolecular Diels–Alder reaction in 1-oxaspiro[2.5]octa-5,7-dien-4-one and sigmatropic shifts in excited states: novel route to sterpuranes and linear triquinanes: formal total synthesis of (±)-coriolin
Intramolecular cycloaddition reactions of exocyclic nitrones
作者:Raymond L. Funk、Gary L. Bolton、Joy Umstead Daggett、Marvin M. Hansen、Linus H.M. Horcher
DOI:10.1016/s0040-4020(01)96702-x
日期:1985.1
Exocyclic nitrones smoothly participate in intramolecular cycloaddition reactions to provide bridged and fused polycarbocycles. The exploitation of this methodology in the total syntheses of the sesquiterpenes (±)-7,12-secoishwaran-12-ol (44), (±)-hirsutene (56), (±)-coriolin (68) is also presented.
Molecular Complexity from Aromatics: Synthesis and Photoreaction of endo -Tricyclo[5.2.2.0 2,6 ]undecanes. Formal Total Syntheses of (±)-Coriolin
作者:Vishwakarma Singh、Biswajit Samanta、Vinayak V Kane
DOI:10.1016/s0040-4020(00)00674-8
日期:2000.9
of cyclopentadiene gave the tricyclic keto epoxide 4 which was elaborated to tricyclo[5.2.2.02,6]undecenones 5 and 18 containing the major structural and stereochemical features of coriolin, in latent form. Triplet sensitized 1,2-acyl shifts in 5 and 18 gave tetracyclic compounds 6 and 19 in a stereoselective manner. Reductivecleavage of cyclopropanerings in 6 and 19 with H2/Pd-C and TBTH-AIBN respectively