Cascade Reactions of Methyl 2-Chloro-2-cyclopropylideneacetate with Five- and Seven-Membered Cyclic Dienolates: A Novel Approach to the Bicyclo[4.2.1]nonane Segment of the Skeleton of Mediterraneols
le Goaller,R.; Dierre,J.-L., Canadian Journal of Chemistry, 1977, vol. 55, p. 757 - 765
作者:le Goaller,R.、Dierre,J.-L.
DOI:——
日期:——
Le Goaller,R.; Pierre,J.-L., Canadian Journal of Chemistry, 1978, vol. 56, p. 481 - 486
作者:Le Goaller,R.、Pierre,J.-L.
DOI:——
日期:——
Ambident Reactivity of Medium-Ring Cycloalkane-1,3-dione Enolates<sup>1</sup>
作者:Glenn S. Thompson、Jerry A. Hirsch
DOI:10.1021/jo971515k
日期:1998.2.1
Cycloalkane-1,3-diones with ring sizes 7-10 have been converted to their enolates and subjected to a variety of ethylation and methylation reagent/solvent systems. The greatest amount of O-alkylation was encountered using ethyl tosylate in HMPA. The O/C alkylation ratios decreased with almost every reagent/solvent system as the ring size was increased. This trend is consistent with greater steric strain in the conjugated enolate resonance contributor, resulting in diminished O-attack as the ring size is increased.
Reaction of 1-silyloxybicyclo[n.1.0]alkanes with iron(III) chlorides. A facile synthesis of 2-cycloalkenones via ring enlargement of cyclic ketones