A stereospecific synthesis of (±)-ferruginol following the Robinson “ring extension” method has been described. The infra-red spectra of the benzoates of the synthetic and natural ferruginol are found to be identical.
THERMAL ELECTROCYCLIC REACTION OF 4-CARBOMETHOXY-3-[<i>CIS</i>-2-(2,6,6-TRIMETHYL-1-CYCLOHEXENYL) VINYL] CYCLOHEX-2-EN-1-ONE
作者:Tong Hei Kim、Sachihiko Isoe
DOI:10.1246/cl.1983.539
日期:1983.4.5
Thermal cyclization of titled cis-trienone 3 leads to a mixture of tricyclic ketone 4 and an unexpected aromatic ketone 5, the latter being derived by the elimination of methyl group.
A process for the production of 2,3,6-trimethylphenol in which diethyl ketone is reacted in the presence of a basic reagent with crotonaldehyde or methyl vinyl ketone (or a compound which in the presence of a basic reagent is converted into crotonaldehyde or methyl vinyl ketone) and the 2,5,6-trimethyl-2-cyclohexen-1-one or 2,3,6-trimethyl-2-cyclohexen-1-one formed is dehydrogenated.