Preparation of Some Novel, Highly Unstable Chain Conjugated 2<i>H</i>-Pyran-5-carboxylates
作者:Cornelis M. Moorhoff
DOI:10.1002/jccs.200300126
日期:2003.8
Aldol condensations of conjugated unsaturated β-ketoesters and unsaturated aldehydes gave chain conjugated 2H-pyran-5-carboxylates.
共轭不饱和 β-酮酯和不饱和醛的醛醇缩合产生链共轭 2H-吡喃-5-羧酸盐。
New Annulation Techniques; Condensations of Phosphonium Ylides and Substituted 2<i>H</i>-Pyran-5-carboxylates; Preparation of Cyclohexenonedicarboxylates and Cyclohexadienedicarboxylates
作者:Cornelis M. Moorhoff
DOI:10.1002/jccs.200300064
日期:2003.6
Substituted alkyl 2H-pyran-5-carboxylates condensed with alkyl 3-oxo-4-(triphenylphosphoranyl-idene)butanoate and alkyl 4-(triphenylphosphoranylidene)-2-butenoate to form substituted 2-vinyl-6-oxo-4-cyclohexene-1,3-dicarboxylates, some of which showed ecto-parasiticidal activity in pets and cattle, and substituted 2-vinyl-3,5-cyclohexadiene-1,3-dicarboxylates, respectively. The last mentioned product