Synthesis of 1,3-Enynes by Iron-Catalyzed Propargylic C-H Functionalization: An Alkyne Analogue for the Eschenmoser Methenylation

A two-step protocol for the conversion of alkyl-substituted alkynes to 1,3-enynes is reported. In this α-methenylation process, an iron-catalyzed propargylic C-H functionalization delivers tetramethylpiperidine-derived homopropargylic amines which undergo facile Cope elimination upon N-oxidation to afford the enyne products. A range of aryl alkyl and dialkyl acetylenes were found to be suitable substrates for this process, which constitutes an alkyne analogue for the Eschenmoser methenylation of carbonyl derivatives. In addition, a new bench-stable precatalyst for iron-catalyzed propargylic C-H functionalization is reported.

Copper-catalyzed 1,1-alkynylalkylation of alkynes: access toward conjugated enynes

A copper-catalyzed 1,1-alkynylalkylation of alkynes with α-haloacetamides for the construction of conjugated enynes has been developed.

Stereoselective synthesis and antitumoral activity of Z-enyne pseudoglycosides

The stereoselective synthesis and antitumoral activity of Z-enyne pseudoglycosides is described.

De novo synthesis of functionalized 1,3-enynes and extended conjugated molecular systems

Pd-catalyzed coupling of 1,3-dienyldibromides with triarylbismuths was demonstrated for the synthesis of a diverse range of 1,3-enynes.

Iron-Catalysed Mizoroki–Heck Reaction using 2,2′-Diamino-6,6′-Dimethylbiphenyl as the Ligand

FeCl3·6H2O-catalysed Mizoroki–Heck reactions of aryl iodides with methyl acrylate have been achieved by using 2,2′-diamino-6,6′-dimethylbiphenyl as the ligand and NaHCO3 as the base in DMF and H2O. It was found that an appropriate amount of H2O is essential for high yields in these reactions.