labile hydrogens results in the formation of complex mixtures. Ethyl malonate and ethyl acetoacetate have, however, been successfully ketovinylated. In the former case, α-carbethoxy-δ-keto-β,γ-unsaturated acids are produced in high yield and depending on the conditions of ketovinylation of ethyl acetoacetate either 4-alkyl salicyclic acids or polysubstituted benzene derivatives may be prepared. Further,
Synthetic studies directed toward the proposed structure for heteroscyphic acid A
作者:Subhabrata Chaudhury、Shukun Li、William A. Donaldson
DOI:10.1039/b602700h
日期:——
A route to the carbon skeleton of the proposedstructure for heteroscyphic acid A was developed utilizing a Mn(III)/Cu(II) mediated oxidative free-radical cyclization and nucleophilic addition to (3-methylpentadienyl)iron(1+) cation.