Triethylsilyl triflate-promoted skeletal rearrangement of bottrospicatols
作者:Seda A. Torosyan、Fanuza A. Gimalova、Ruslan F. Valeev、Mansur S. Miftakhov
DOI:10.1016/j.mencom.2011.04.008
日期:2011.5
Treatment of diastereomeric (1R,5R,6R)- and (1R,5R,6S)-6-hydroxymethyl-2,6-dimethyl-7-oxabicyclo[3.2.1]oct-2-enes with Et3SiOTf leads to scalemic (1R,5R,6R)- and (1R,5R,65)-6-hydroxy-2,6-dimethyl-8-oxabicyclo[3.3.1]non-2-enes.
Solid acid-catalysed isomerization of R(+)-limonene diepoxides
作者:Oksana V. Salomatina、Olga I. Yarovaya、Dina V. Korchagina、Marina P. Polovinka、Vladimir A. Barkhash
DOI:10.1070/mc2005v015n02abeh001983
日期:——
The isomerization of diastereomeric R(+)-limonene diepoxides on solid catalysts, such as clays, zeolites, and solid superacids, results in the formation of bicyclic and tricyclic oxygen-containing compounds.
Cyclization of unsaturated monoterpenic alcohols mediated by thallium (III) salts
作者:Helena M.C. Ferraz、Carlos M.R. Ribeiro、Mônica V.A. Grazini、Timothy J. Brocksom、Ursula Brocksom
DOI:10.1016/s0040-4039(00)76741-4
日期:1994.3
thallium trinitrate with four monoterpenic unsaturated alcohols (isopulegol, neo-isopulegol, cis-carveol and α-terpineol), in AcOH:H2O (1:1, vol/vol) as solvent, led to the corresponding β-hydroxy-cyclic ethers with high regio- and stereoselectivity, in moderate to good yields. A mechanism of ring-contraction or ring-expansion of the oxythallated adduct is proposed, based on the substitution patterns of