Results 251 to 260 of about 20,187 (313)

Exclusive SAPO-seeded synthesis of ZK-5 zeolite for selective synthesis of methylamines

Inorganic Chemistry Frontiers, 2022
The selectivity for monomethylamine plus dimethylamine is urged to be improved in selective synthesis of methylamines due to their high value as the chemical intermediates.
Rui Wu, Jinfeng Han, Yunzheng Wang, M. Chen, Peng Tian, Xue Zhou, Jun Xu, Jianan Zhang, Wenfu Yan   +8 more
semanticscholar   +1 more source

Direct Catalytic Asymmetric α-Allylic Alkylation of Aza-aryl Methylamines by Chiral-Aldehyde-Involved Ternary Catalysis System.

Organic Letters, 2021
A ternary catalytic system comprising a chiral aldehyde, a transition metal, and a Lewis acid is rationally designed for the asymmetric α-allylic alkylation reaction of aza-aryl methylamines and π-allylmetal electrophiles.
Fang Zhu, Qi-Wen Shen, Wenzhe Wang, Zhu-Lian Wu, Tian Cai, Wei Wen, Qixiang Guo   +6 more
semanticscholar   +1 more source

Methylamine

2022
The German Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area has re-evaluated methylamine [74-89-574-89-5]. The critical effect is irritation of the nasal airways as observed in a 2-week study in rats with a NOAEC of 75 ml/m3.
Hartwig, Andrea, MAK Commission
openaire   +1 more source

Renewable and Biocompatible Lecithin as an Efficient Organocatalyst for Reductive Conversion of CO2 with Amines to Formamides and Methylamines

ACS Sustainable Chemistry and Engineering, 2018
Transformation of carbon dioxide (CO2) into valuable chemicals is of great importance, and development of novel and efficient catalysts is crucial.
Yue Hu, Jinliang Song, Chao Xie, Haoran Wu, Zhenpeng Wang, T. Jiang, Lei Wu, Yu Wang, B. Han   +8 more
semanticscholar   +1 more source

Highly Efficient Thiolate-Based Ionic Liquid Catalysts for Reduction of CO2: Selective N-Functionalization of Amines to Form Formamides and Methylamines.

Chemistry
Developing efficient catalysts to convert CO2 into value-added chemicals is valuable for reducing carbon emissions. Herein, a kind of novel thiolate-based ionic liquid with sulfur as the active site was designed and synthesized, which served as highly ...
Jiakai Wu, Junping Niu, Lu Hou, Siliu Cheng, Ruijun Xie, Ning Zhu   +5 more
semanticscholar   +1 more source

Methylamine in human urine

Clinica Chimica Acta, 2001
Methylamine is the simplest aliphatic amine found in human urine. In the body it is thought to play a significant part in central nervous system disturbances observed during renal and hepatic disease and also has a role in general toxicity caused by oxidative stress.
S C, Mitchell, A Q, Zhang
openaire   +2 more sources

Dihydrobis(methylamine)borate triiodide

Acta Crystallographica Section C Crystal Structure Communications, 2006
Both cation and anion in the title compound, C2H12BN2+.I3-, lie on a crystallographic mirror plane and are bound in the lattice by N-H...I- hydrogen bonds, forming layers. Methyl-H-borane-H dihydride [-C-H(delta+)...(delta-)H-B-] interactions between molecules crosslink adjacent layers, giving ;sandwich' stacking along the a axis.
Graeme J, Gainsford, Tim, Kemmitt
openaire   +2 more sources

Enzymology of Methylamine Dehydrogenase

1996
Methylamine dehydrogenase (MADH) belongs to the class of quinoprotein enzymes because it has tryptophyl tryptophanquinone (TTQ) as cofactor. In most cases, it is clear that the small blue copper protein, amicyanin, functions as natural electron acceptor.
Gorren, A.F.C., van der Palen, C.J.N.M., van Spanning, Rob, Duine, J.A.   +3 more
openaire   +2 more sources

Microwave Spectrum of Methylamine (I)

Journal of the Physical Society of Japan, 1953
Microwave spectrum of methylamine molecule has been studied in the frequency range between 7 and 30 kMc/sec. More than two hundred lines and their Stark effects have been measured. These lines are divided into three kinds: (1) Δ J =0, Δ K =±1, (2) Δ J =±1, \(\varDelta K{=}{\mp}1\), and (3) Δ J =0, Δ K =0.
Koichi Shimoda, Tetsuji Nishikawa
openaire   +1 more source

Methylamination of some 3-nitro-1,5-naphthyridines with liquid methylamine/potassium permanganate

Journal of Heterocyclic Chemistry, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Maria Grzegozek, Barbara Szpakiewicz
openaire   +1 more source