Cyclobutadiene Metal Complexes: A New Class of Highly Selective Catalysts. An Application to Direct Reductive Amination
作者:Oleg I. Afanasyev、Alexey A. Tsygankov、Dmitry L. Usanov、Dmitry S. Perekalin、Nikita V. Shvydkiy、Victor I. Maleev、Alexander R. Kudinov、Denis Chusov
DOI:10.1021/acscatal.5b02916
日期:2016.3.4
A catalyst of a new type, cyclobutadiene complex [(C4Et4)Rh(p-xylene)]PF6, was found to promote selective reductive amination in the presence of carbon monoxide under mild conditions (1–3 bar, 90 °C). The reaction demonstrated perfect compatibility with a wide range of functional groups prone to reduction by conventional reducing agents. The developed system represents the first systematic investigation
发现一种新型的环丁二烯络合物[(C 4 Et 4)Rh(对二甲苯)] PF 6的催化剂可在温和条件下(1-3 bar,90° C)。该反应证明与易于被常规还原剂还原的各种官能团具有完美的相容性。开发的系统代表了环丁二烯金属配合物作为催化剂的首次系统研究。
Nickel-catalyzed hydrogenative coupling of nitriles and amines for general amine synthesis
作者:Vishwas G. Chandrashekhar、Wolfgang Baumann、Matthias Beller、Rajenahally V. Jagadeesh
DOI:10.1126/science.abn7565
日期:2022.6.24
Efficient and general methods for the synthesis of amines remain in high demand in the chemical industry. Among the many known processes, catalytic hydrogenation is a cost-effective and industrially proven reaction and currently used to produce a wide array of such compounds. We report a homogeneous nickel catalyst for hydrogenative cross coupling of a range of aromatic, heteroaromatic, and aliphatic
This invention relates to nanocomposites comprising organo-clay and at least one stabilization functionalized thermoplastic polyolefin. Preferably the stabilization functionalized thermoplastic polyolefin is represented by the formula:
T-(R
1
G)
n
wherein
T represents the thermoplastic polyolefin
Each R
1
is a bridging group, preferably independently selected from the group consisting of C
1
to C
20
aliphatic; C
1
to C
20
aromatic; substituted C
1
to C
20
aliphatic; substituted C
1
to C
20
aromatic; C
1
to C
20
aliphatic ester; C
1
to C
20
aliphatic ether; C
1
to C
20
aliphatic amide; C
1
to C
20
aliphatic imide;
n is the number of stabilization functional/bridging groups bound to T and may be from 1-300; and
G is selected from one or more of phenols, ketones, hindered amines, substituted phenols, substituted ketones, substituted hindered amines, or combinations thereof.