Iron-Catalyzed Stereospecific Activation of Olefinic C–H Bonds with Grignard Reagent for Synthesis of Substituted Olefins
作者:Laurean Ilies、Sobi Asako、Eiichi Nakamura
DOI:10.1021/ja2017202
日期:2011.5.25
The reaction of an aryl Grignard reagent with a cyclic or acyclic olefin possessing a directing group such as pyridine or imine results in the stereospecific substitution of the olefinic C-H bond syn to the directing group. The reaction takes place smoothly and without isomerization of the product olefin in the presence of a mild oxidant (1,2-dichloro-2-methylpropane) and an aromatic cosolvent. Several
Boron Lewis Acid-Catalyzed Hydrophosphinylation of <i>N</i>-Heteroaryl-Substituted Alkenes with Secondary Phosphine Oxides
作者:Jimin Han、Jongwon Kim、Jaehoo Lee、Younghun Kim、Sarah Yunmi Lee
DOI:10.1021/acs.joc.0c02246
日期:2020.12.4
secondary phosphine oxides that furnishes various phosphorus-containing N-heterocycles. This process proceeds under mild conditions and enables the introduction of a phosphorus atom into multisubstituted alkenylazaarenes. The available mechanistic data can be explained by a reaction pathway wherein the C–P bond is created by the reaction between the activated alkene (by coordination to a boron catalyst)
oxide bifunctional ligand, have been developed for site-selectiveC−H alkenylation of N-heteroarenes with alkynes. Pyridines, pyridones, and imidazo[1,2-a]pyridines are efficiently alkenylated at the C−H site proximal to the Lewis basic nitrogen or oxygen. A ligand-to-ligand hydrogen transfer process is proposed as a general mechanism of these C−H activations.
A metal complex composition comprising a metal complex including a structure represented by the following formula (1) and a charge transport material,
wherein in the formula (1), R
a
represents an alkyl group having 2 to 30 carbon atoms, and R
1
, R
2
, R
3
and R
4
each independently represent a hydrogen atom, an alkyl group having 1 to 30 carbon atoms that may have a substituent, or the like, provided that adjacent groups among R
1
, R
2
, R
3
and R
4
may be bonded to each other to form a ring structure.