A number of terpenoid bicyclic ethers have been prepared by cyclisation of suitable precursors in fluorosulphuric acid–sulphur dioxide. The products are formed under a mixture of thermodynamic and kinetic control, and five-, and six-, and seven-membered-ring ethers are obtained. Both primary and secondary alcohols have been cyclised by attack of the hydroxy group on carbocation centres generated by
Thallium Trinitrate Mediated Oxidation of 3-Alkenols: Ring Contraction vs Cyclization
作者:Helena M. C. Ferraz、Luiz S. Longo、Julio Zukerman-Schpector
DOI:10.1021/jo011178m
日期:2002.5.1
The reaction of a series of six-membered ring 3-alkenols with thallium trinitrate (TTN) in three different experimental conditions was studied. Either cyclization products or ring contraction products were obtained, depending on the structure of the substrate as well as the nature of the solvent. The reaction of a seven-membered ring 3-alkenol with TTN led to the ring contraction product exclusively.
Eine einfache Methode zur Herstellung von Cyclohexylidenacetaldehyden
作者:Maud BRINK
DOI:10.1055/s-1975-23720
日期:——
Regnier,G. et al., Chimica Therapeutica, 1969, vol. 4, p. 174 - 184
作者:Regnier,G. et al.
DOI:——
日期:——
CARR, GRAHAM;DEAN, CHRISTOPHER;WHITTAKER, DAVID, J. CHEM. SOC. PERKIN TRANS.,(1988) N 3, 351-354
作者:CARR, GRAHAM、DEAN, CHRISTOPHER、WHITTAKER, DAVID