Transposition oxy-cope assistee par le trifluoroacetate mercurique en quantite stoechiometrique et en quantite catalytique
作者:Norbert Bluthe、Max Malacria、Jacques Gore
DOI:10.1016/0040-4020(84)85011-5
日期:1984.1
Tertiary 1,5-hexadien-3-ols are transformed at room temperature into δ-ethylenic ketones in 35-90%, yields under two sets of conditions: treatment with one molar equivalent of mercuric trifluoroacetate followed by demercuration of the intermediate α-mercuro ketone with sodium borohydride; and treatment with 0.2 molar equivalent of t of lithium trifluoroacetate or trifluorométhansulfonate. The reactions
The photoreaction of the enone (I) with cyclopentene gave the radical coupling products, (VII) and (VIII), along with the hydrogen abstraction product (VI), but not [2π+2π] photocycloadduct. On the other hand, the photoreaction of I with cyclohexene proceeded in somewhat different manner to give the [2π+2π] photocycloadduct (V) other than the hydrogen abstraction product (VI) and the radical coupling product (IX).
A Novel Method of Annulation through α,β-Epoxy Sulfoxides with the Aid of Intramolecular Radical Cyclization
作者:Tsuyoshi Satoh、Masayuki Itoh、Koji Yamakawa
DOI:10.1246/cl.1987.1949
日期:1987.10.5
A novel method of annulation was realized from ketones through α,β-epoxy sulfoxides with the aid of endo-type intramolecular radical cyclization. In these reactions 1-chloroalkyl phenyl sulfoxides having phenylseleno group on an end of the alkyl group acted as synthons of the annulation.