Alkene Isomerization Revitalizes the Coates‐Claisen Rearrangement

Polysulfones: catalysts for alkene isomerization.

Alkene Photo-Isomerization Inspired by Vision

A lkenes are amongst the most versatile functional groups in synthetic organic chemistry. They can be readily functionalized using a broad toolbox of reagent and catalyst-based methods, which provide more complex molecules for a host of applications. Alkenes are most commonly and conveniently prepared using Wittigand Julia-type reactions of carbonyl electrophiles; however, control over the prod...

A Novel Isomerization of an Electron-Rich Alkene

Organoiron Complexes, Olefin Isomerization, 1,2-Dimethoxyethylene Displacement of 2-methvlpropene from [Fp(Me2C = CH2)]BF4 (Fp = (/?5-C5H5)Fe(CO)2) by Z-1,2-dimethoxyethylene (Z-DME) gives [Fp(Z-DME)]BF4. Displacement by E-1,2dimethoxyethylene (E-DME), in contrast, does not give the expected complex of E-DME, but rather the complex of the Z-alkene. A mechanism involving scission of the C = C bo...

Easy access to enamides: a mild nickel-catalysed alkene isomerization of allylamides.

The first Ni-catalysed alkene isomerization of allylamides for the synthesis of enamides was demonstrated. Various substituted N-allylamides were found to be suitable substrates for this isomerization. Isotopic labelling experiments showed that it is an intramolecular hydrogen transfer process.

Iridium complexes of new NCP pincer ligands: catalytic alkane dehydrogenation and alkene isomerization.

Iridium complexes of novel NCP pincer ligands containing pyridine and phosphinite arms have been synthesized. One Ir complex shows good catalytic activity for alkane dehydrogenation, and all complexes are highly active for olefin isomerization. A combination of the Ir complex and a (PNN)Fe pincer complex catalyzes the formation of linear alkylboronates selectively from internal olefins via sequ...