Rhodium nitrosyl catalysts for CO<sub>2</sub>
hydrogenation to formic acid under mild conditions
作者:Fenglou Zou、Jacqueline M. Cole、Timothy G. J. Jones、Li Jiang
DOI:10.1002/aoc.2898
日期:2012.10
A new synthetic protocol for catalysing CO2 hydrogenation to formic acid under mild conditions is reported, and the CO2 hydrogenation is efficiently achieved by dcpe‐rhodium‐nitrosyl catalyst precursors, Rh(NO)(dcpe) (1) (dcpe = 1,2‐dicyclohexylphosphinoethane) and Rh(III)(NO)(dcpe)Cl2 (2). The catalytic activity of 1 is noteworthy for being able to proceed in the absence of protic conditions. Compound
COPPER CATALYZED HALOGENATON AND REACTION PRODUCTS
申请人:Wisconsin Alumni Research Foundation
公开号:US20140371480A1
公开(公告)日:2014-12-18
A Cu(I)-catalyzed 1,3-halogen migration reaction effectively recycles an activating group by transferring a halogen from an sp
2
to a benzylic carbon with good enantioselectivity and concomitant borylation of the Ar-halo bond. The resulting enantio-enriched benzyl halide can be reacted in the same vessel under a variety of conditions to form an additional carbon-heteroatom or carbon-carbon bond while maintaining high ee. The reaction can be used to efficiently prepare novel compounds and intermediates for the preparation of therapeutics and ligands for catalysis.
technique using transition metal-catalysed hydrogenation with parahydrogen. We examined rhodiumcatalysts and their kinetic studies, rarely considered in the research of current PHIP. It emerged that rhodium complexes with electron-donating bisphosphine ligands, with a dicyclohexylphosphino group, appear to be more effective than conventional rhodiumcatalysts.
BIPYRIDINE COMPOUND, TRANSITION METAL COMPLEX, AND METHOD FOR PRODUCTION OF CONJUGATED AROMATIC COMPOUND USING THE TRANSITION METAL COMPLEX
申请人:Asaumi Taku
公开号:US20100184978A1
公开(公告)日:2010-07-22
A bipyridine compound represented by the formula (1):
wherein R
1
, R
2
and R
3
each independently represent a C1-C10 alkyl group which may be substituted etc., and R
4
, R
5
, R
6
, R
7
and R
8
each independently represent a hydrogen atom etc., a transition metal complex obtained by contacting a bipyridine compound represented by the formula (1) with a compound of a transition metal belonging to Group 9, 10 or 11, and a method for production of a conjugated aromatic compound comprising reacting an aromatic compound (A) wherein one or two leaving groups are bonded to an aromatic ring with an aromatic compound (A) having the same structure as that of the above-mentioned aromatic compound (A) or an aromatic compound (B) being structurally different from the above-mentioned aromatic compound (A) and having one or two leaving groups bonded to an aromatic ring, in the presence of the transition metal complex.
TRANSITION METAL COMPLEX AND PROCESS FOR PRODUCING CONJUGATED AROMATIC COMPOUND USING THE TRANSITION METAL COMPLEX
申请人:Asaumi Taku
公开号:US20110046336A1
公开(公告)日:2011-02-24
A transition metal complex obtained by contacting a bipyridine compound represented by the formula (1):
wherein R
1
, R
2
and R
3
represent a C1-C10 alkyl group which may be substituted, etc., and R
4
and R
5
represent a hydrogen atom etc., with a compound of a transition metal belonging to Group 9, 10 or 11, and a process for producing a conjugated aromatic compound comprising reacting an aromatic compound (A) wherein one or two leaving groups are bonded to an aromatic ring with an aromatic compound (A) having the same structure as that of the above-mentioned aromatic compound (A) or an aromatic compound (B) being structurally different from the above-mentioned aromatic compound (A) and having one or two leaving groups bonded to an aromatic ring, in the presence of said transition metal complex.