“Bulky-Yet-Flexible” α-Diimine Palladium-Catalyzed Reductive Heck Cross-Coupling: Highly Anti-Markovnikov-Selective Hydroarylation of Alkene in Air
作者:Xu-Wen Yang、Dong-Hui Li、A-Xiang Song、Feng-Shou Liu
DOI:10.1021/acs.joc.0c01509
日期:2020.9.18
regioselective and efficient reductive Heck reaction, a series of moisture- and air-stable α-diimine palladium precatalysts were rationally designed, readily synthesized, and fully characterized. The relationship between the structures of the palladiumcomplexes and the catalytic properties was investigated. It was revealed that the“bulky-yet-flexible”palladiumcomplexes allowed highly anti-Markovnikov-selective
Pd-Catalyzed reductive heck reaction of olefins with aryl bromides for Csp<sup>2</sup>–Csp<sup>3</sup> bond formation
作者:Liqun Jin、Jiaxia Qian、Nan Sun、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1039/c8cc02571a
日期:——
We developed a Pd-catalyzed intermolecular reductive Heck reaction to construct Csp2–Csp3 bonds between arylbromides and olefins. Various styrene derivatives, acyclic and cyclic alkenes, were well tolerated to couple with varied arylbromides in linear selectivity. Kinetic and deuterium labeling experiments suggested that i-PrOH provides a hydride through β-H elimination.
The invention relates to bimesogenic compounds of formula (I): R
1
-MG-X-Sp-X
2
-MG-R
2
wherein R
1
, R
2
, MG
1
, MG
2
, X
1
, X
2
and Sp have the meaning given in claim
1,
to the use of bimesogenic compounds of formula (I) in liquid crystal media and devices, in particular in flexoelectric liquid crystal devices, to liquid crystal media and devices, in particular flexoelectric devices, comprising bimesogenic compounds of formula (I) and to improvements in flexoelectric devices.
Gascoyne,J.M. et al., Journal of the Chemical Society. Perkin transactions II, 1977, p. 1051 - 1057
作者:Gascoyne,J.M. et al.
DOI:——
日期:——
AMINE DERIVATIVES HAVING NPY Y5 RECEPTOR ANTAGONISTIC ACTIVITY AND THE USES THEREOF
申请人:OKUNO Takayuki
公开号:US20100273842A1
公开(公告)日:2010-10-28
This invention provides an anorectic or anti-obesity composition comprising a compound of the formula (I):
a pharmaceutically acceptable salt or solvate thereof,
wherein
R
1
is optionally substituted lower alkyl,
Y is —S(O)
n
— wherein n is 1 or 2, or —CO—,
R
2
is hydrogen or lower alkyl,
R
7
is hydrogen or lower alkyl,
X is lower alkylene, lower alkenylene, arylene, cycloalkylene or the like, and
Z is lower alkyl, optionally substituted carbocyclyl, optionally substituted heterocyclyl or the like.