- Convenient semihydrogenation of azoarenes to hydrazoarenes using H2
-
The high atom-economical and eco-benign nature of hydrogenation reactions make them much more superior to conventional reduction and transfer hydrogenation. Herein, a convenient and highly selective hydrogenation reaction of azoarenes using molecular hydrogen to access diverse hydrazoarenes is reported. The present catalytic method is general and operationally simple, and it operates under exceedingly mild conditions (room temperature and 1 atm of hydrogen pressure). The reusability of catalysts used in this method is also successfully demonstrated.
- Sahoo, Manoj K.,Sivakumar, Ganesan,Jadhav, Sanjay,Shaikh, Samrin,Balaraman, Ekambaram
-
supporting information
p. 5289 - 5293
(2021/06/30)
-
- Electrochemical dehydrogenation of hydrazines to azo compounds
-
A strategy for the electrochemical dehydrogenation of hydrazine compounds is disclosed under ambient conditions. This protocol proceeded smoothly in ethanol by employing electrons as clean oxidants. Its synthetic value is well demonstrated by the highly efficient synthesis of symmetric and unsymmetric azo compounds. It is an environmentally friendly transformation and the present protocol was effective on a large scale.
- Du, Ke-Si,Huang, Jing-Mei
-
supporting information
p. 1680 - 1685
(2019/04/08)
-
- Dehydrogenation of the NH?NH Bond Triggered by Potassium tert-Butoxide in Liquid Ammonia
-
A novel strategy for the dehydrogenation of the NH?NH bond is disclosed using potassium tert-butoxide (tBuOK) in liquid ammonia (NH3) under air at room temperature. Its synthetic value is well demonstrated by the highly efficient synthesis of aromatic azo compounds (up to 100 % yield, 3 min), heterocyclic azo compounds, and dehydrazination of phenylhydrazine. The broad application of this strategy and its benefit to chemical biology is proved by a novel, convenient, one-pot synthesis of aliphatic diazirines, which are important photoreactive agents for photoaffinity labeling.
- Wang, Lei,Ishida, Akiko,Hashidoko, Yasuyuki,Hashimoto, Makoto
-
p. 870 - 873
(2017/01/14)
-
- Flexible porous coordination polymers constructed from 1,2-bis(4-pyridyl) hydrazine via solvothermal in situ reduction of 4,4′-azopyridine
-
Solvothermal reactions of Zn(NO3)2, 1,4-benzenedicarboxylic acid (H2bdc), and 4,4′-azopyridine (azpy) in different conditions yielded [Zn(bdc)(bphy)]·DMF·H 2O (1a, bphy = 1,2-bis(4-pyridyl)hydrazine, DMF = N,N-dimethylformamide) and [Zn(bdc)(bphy)]·EtOH·H2O (1b) with two-fold interpenetrated dmp topology and [Zn2(bdc) 2(bphy)]·1.5EtOH·H2O (2a) and [Zn 2(bdc)2(bphy)]·DMA·1.5H2O (2b, DMA = N,N-dimethylacetamide) with two-fold interpenetrated pcu topology. The in situ reduction of azpy to bphy was confirmed by single-crystal structures and LC-MS analyses of the acid-digested crystalline samples, as well as controlled solvothermal experiments. Removal of the guest molecules in 1a/1b and 2a/2b converts the materials to guest-free phases [Zn(bdc)(bphy)] (1) and [Zn 2(bdc)2(bphy)] (2), respectively, which were identified by PXRD. CO2 sorption experiments performed at 195 and 298 K showed low porosity for 1 and gated sorption behavior for 2. At 298 K, 2 exhibits high selectivity for adsorbing CO2 over CH4. The Royal Society of Chemistry 2011.
- Liu, Xiao-Min,Xie, Lin-Hua,Lin, Jian-Bin,Lin, Rui-Biao,Zhang, Jie-Peng,Chen, Xiao-Ming
-
scheme or table
p. 8549 - 8554
(2011/10/10)
-
- A Novel and Efficient Deoxygenation of Hetero Cyclic N-Oxides Using ZrCl4/NaBH4
-
A practical and novel reagent system ZrCl4/NaBH4 is used for the deoxygenation of N-Oxides to amines is described.
- Chary, K. Purushothama,Mohan, G. Hari,Iyengar, D. S.
-
p. 1339 - 1340
(2007/10/03)
-
- Chemical Constitution and Activity of Bipyridinium Herbicides. XV Synthesis, Reduction and Biological Activity of 4,4'-Azobis(1-methylpyridinium) Bis(methyl sulfate)
-
4,4'-Azobis(1-methylpyridinium) bis(methyl sulfate) is reduced in aqueous solution by zinc powder to the corresponding hydrazo diquaternary salt.
- Rockley, Jean E.,Summers, Lindsay A.
-
p. 2683 - 2686
(2007/10/02)
-