KRASNAYA ZH. A.; PROKOFEV E. P.; KUCHEROV V. F., IZV. AN CCCP. CEP. XIM., 1979, HO 4, 816-822
作者:KRASNAYA ZH. A.、 PROKOFEV E. P.、 KUCHEROV V. F.
DOI:——
日期:——
Catalyzed Diels−Alder Reaction of Alkylidene- or Arylideneacetoacetates and Danishefsky's Dienes with Lanthanide Salts Aimed at Selective Synthesis of <i>cis</i>-4,5-Dimethyl-2-cyclohexenone Derivatives
of 1a. The thermal version of the same cycloaddition results in a decrease in the cis arrangement of the 5-methyl and the 4-alkoxycarbonyl groups on 2-cyclohexenone. The catalyzed reaction of (E)-1a unexpectedly affords the cis-arranged 3a. The reaction path for the catalyzed Diels-Alder reaction is postulated on the basis of these results.