Photoreaction of 1-cyano-2-phenylethene and 1,1-dicyano-2-phenylethene with β,β-dialkyl-substituted ketene silyl acetals in acetonitrile in the presence of aromatic hydrocarbon as a photosensitizer regioselectively afforded alkylated products in high yields.
A one-pot two-step reaction (Knoevenagel condensation – reduction of the double bond) has been developed using calcium hydride as a reductant in the presence of a supported noble metal catalyst. The reaction between carbonyl compounds and active methylene compounds such as methylcyanoacetate, 1,3-dimethylbarbituric acid, dimedone and the more challenging dimethylmalonate, affords the corresponding
Palladium catalyzed direct benzylation/allylation of malonates with alcohols – in situ C–O bond activation
作者:Xueqin Cao、Yugen Zhang
DOI:10.1039/c6gc00163g
日期:——
High step- and atomic-economy are the endless pursuit in organic and pharmaceutical synthesis. Herein, a new method for directly coupling of benzyl/allylalcohols with malonates via palladium catalyzed Tsuji-Trost type...
of electron-deficient alkenes with disilanes in acetonitrile gave silylated alkanes in high yields. The photosilylation occurred in a highly regioselective manner at the position β to the electron-withdrawing groups of the alkenes. With asymmetrically substituted disilanes and polysilanes, silyl groups bearing more bulky substituents were preferentially introduced to the alkenes. The photoreactions were
The present invention is drawn to novel antiviral compounds, pharmaceutical compositions and their use. More specifically this invention is drawn to derivatives of monocyclic polyamines which have activity in standard tests against HIV- or FIV-infected cells as well as other biological activity related to binding of ligands to chemokine receptors that mediate a number of mammalian embryonic developmental processes.