Copper-catalyzed aerobic oxidative domino cyclization of methyl azaarenes with 6-amino-pyrimidine-2,4-diones and pyrazol-5-amines: access to dipyrazolo/dipyrimidine-fused pyridines

2021 ◽  
Author(s):  
Rong-Ji Xie ◽  
Jun-Hua Liu ◽  
Qiu-Yi Zhang ◽  
Yi-Jie Yang ◽  
Li-Qun Song ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Amino Pyrimidine

An aerobic copper-catalyzed oxidative domino cyclization of methyl azaarenes with 6-amino-pyrimidine-2,4-diones and pyrazol-5-amines has been developed, which enables access to dipyrazolo/dipyrimidine-fused pyridines. Cu(OTf)2 is used as a transition-metal catalyst. The...

COx-free hydrogen production via ammonia decomposition over mesoporous Co/Al2O3 catalysts with highly dispersed Co species synthesized by a facile method

2021 ◽  
Author(s):  
Yingqiu Gu ◽  
Di Xu ◽  
Yun Huang ◽  
Zhouyang Long ◽  
Guojian Chen
Keyword(s):  
Fuel Cells ◽  
Hydrogen Production ◽  
Transition Metal ◽  
Transition Metals ◽  
Ammonia Decomposition ◽  
Metal Catalyst ◽  
Facile Synthesis ◽  
Transition Metal Catalyst ◽  
Highly Dispersed ◽  
Free Hydrogen

Transition metals have been considered as potential catalysts for ammonia decomposition to produce COx-free hydrogen for fuel cells. However, the facile synthesis of transition metal catalyst with small size active...

scholarly journals Transition Metal Catalyst‐Free, Base‐Promoted 1,2‐Additions of Polyfluorophenylboronates to Aldehydes and Ketones

2021 ◽  
Author(s):  
Zhiqiang Liu ◽  
Goutam Kumar Kole ◽  
Yudha P. Budiman ◽  
Ya-Ming Tian ◽  
Alexandra Friedrich ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Catalyst ◽  
Free Base ◽  
Transition Metal Catalyst ◽  
Catalyst Free ◽  
Aldehydes And Ketones

Pyridine mediated transition-metal-free direct alkylation of anilines using alcohols via borrowing hydrogen conditions

2020 ◽  
Vol 56 (88) ◽  
pp. 13607-13610 ◽  
Author(s):  
Rajagopal Pothikumar ◽  
Venugopal T Bhat ◽  
Kayambu Namitharan
Keyword(s):  
Transition Metal ◽  
Traditional Approach ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Metal Free ◽  
Borrowing Hydrogen ◽  
Activation Of Alcohols ◽  
Catalyst Systems ◽  
Hydrogen Reactions

Herein, we report aza-aromatics based organic mediators as a readily accessible alternative to the traditional approach of using transition metal catalyst systems for the activation of alcohols in borrowing hydrogen reactions.

Copolymerization Studies of Vinyl Chloride and Vinyl Acetate with Ethylene Using a Transition-Metal Catalyst

2002 ◽  
Vol 124 (30) ◽  
pp. 8790-8791 ◽  
Author(s):  
Harold W. Boone ◽  
Phillip S. Athey ◽  
Michael J. Mullins ◽  
Dean Philipp ◽  
Richard Muller ◽  
...  
Keyword(s):  
Transition Metal ◽  
Vinyl Acetate ◽  
Vinyl Chloride ◽  
Metal Catalyst ◽  
Transition Metal Catalyst

scholarly journals Ferritin encapsulation of artificial metalloenzymes: engineering a tertiary coordination sphere for an artificial transfer hydrogenase

2018 ◽  
Vol 47 (32) ◽  
pp. 10837-10841 ◽  
Author(s):  
Martina Hestericová ◽  
Tillmann Heinisch ◽  
Markus Lenz ◽  
Thomas R. Ward
Keyword(s):  
Transition Metal ◽  
Coordination Sphere ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Artificial Metalloenzymes

Creating a tertiary coordination sphere around a transition metal catalyst incorporated within a protein affects its catalytic turnover and enantioselectivity.

Formation of active species for propane dehydrogenation with hydrogen sulfide co-feeding over transition metal catalyst

2019 ◽  
Vol 587 ◽  
pp. 117238 ◽  
Author(s):  
Ryo Watanabe ◽  
Nozomu Hirata ◽  
Kazuya Miura ◽  
Yuta Yoda ◽  
Yuya Fushimi ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Transition Metal ◽  
Active Species ◽  
Propane Dehydrogenation ◽  
Metal Catalyst ◽  
Transition Metal Catalyst

Synthesis of N-Aryl-4-arylhexahydroquinoline Derivatives by Reaction of Cyclic Enaminones with Arylidenemalononitriles in DMSO

Synthesis ◽  
2020 ◽  
Author(s):  
Takeshi Oriyama ◽  
Wei Han ◽  
Chika Inoue ◽  
Tsunaki Onizawa
Keyword(s):  
Transition Metal ◽  
Dimethyl Sulfoxide ◽  
Molecular Sieves ◽  
Metal Catalyst ◽  
Reaction Conditions ◽  
Transition Metal Catalyst ◽  
Cyclic Enaminones ◽  
High Yields

AbstractThe reaction of cyclic enaminones with arylidenemalono­nitriles was carried out in the presence of 13X molecular sieves in dimethyl sulfoxide. Under these mild reaction conditions, various bioactive N-aryl-4-arylhexahydroquinoline derivatives were obtained in high yields without the necessity of using transition-metal catalyst, organobase, or reflux conditions.

Sign in / Sign up

Export Citation Format

Share Document