Results 141 to 150 of about 166,984 (347)

Generalized Analysis of Electrophilic Small Molecules

Angewandte Chemie, EarlyView.
Generalized fragmentation patterns stand to unlock the utility of tandem‐mass spectrometry for chemical reaction analysis but are bottlenecked by time consuming method development. Here were show how we can analyze most electrophilic small molecules the same way by their conjugation with a simple MS/MS encoded chemical probe.
Uma Neelakantan, Maowei Hu, Jiya Bhatia, Huyen N. Nguyen, John (Bobby) Yeboah, Eirinaios I. Vrettos, Dionysius Copoulos, Khue N. M. Nguyen, Madan M. Babu, Daniel J. Blair   +9 more
wiley   +2 more sources

Crystal structure of the inclusion complex 25-benzoylmethoxy-5,11,17,23-tetra-tert-butyl-26,27,28-trihydroxy-2,8,14,20-tetrathiacalix[4]arene–tetraethylammonium chloride (1/1)

Acta Crystallographica Section E: Crystallographic Communications, 2015
The asymmetric unit of the title compound, C48H54O5S4·N(C2H5)4+·Cl−, contains two tetra-tert-butyl-[(benzoyl)methoxy]-trihydroxy-tetrathiacalix[4]arene molecules, two tetraethylammonium cations and two chloride anions. The two calixarene molecules in the
Mehmet Akkurt, Jerry P. Jasinski, Shaaban K. Mohamed, Omran A. Omran, Mustafa R. Albayati   +4 more
doaj   +1 more source

Study on the regioselectivity of the N-ethylation reaction of N-benzyl-4-oxo-1,4-dihydroquinoline-3-carboxamide

Beilstein Journal of Organic Chemistry, 2019
4-Oxoquinolines are a class of organic substances of great importance in medicinal chemistry, due to their biological and synthetic versatility. N-1-Alkylated-4-oxoquinoline derivatives have been associated with different pharmacological activities such ...
Pedro N. Batalha, Luana da S. M. Forezi, Maria Clara R. Freitas, Nathalia M. de C. Tolentino, Ednilsom Orestes, José Walkimar de M. Carneiro, Fernanda da C. S. Boechat, Maria Cecília B. V. de Souza   +7 more
doaj   +1 more source

Ligand Dependent Regioselectivity in Palladium Mediated Allylic Alkylation

, 2010
In this thesis, different aspects on ligand dependent regioselectivity in palladium mediated allylic alkylation have been studied. It is believed that the regioselectivity is a result of nucleophilic attack trans to phosphorous when applying ligands ...
Johansson, Charlotte, Lloyd-Jones, Guy C., Norrby, Per-Ola   +2 more
core   +1 more source

Tungsten-Catalyzed Direct N-Alkylation of Amines with Alcohols

, 2020
The implementation of earth-abundant metals mediated chemistry is a major goal in homogeneous catalysis. Borrowing hydrogen/hydrogen autotransfer (BH/HA) reaction, as a straightforward and sustainable synthetic method, has attracted considerable ...
Ming, Huang, Jiahao, Liu, Zhuofeng, Ke, Weikang, Li, Yan, Liu, Xiao-Bing, Lan, Zongren, Ye   +6 more
core   +1 more source

A challenging redox neutral Cp*Co(III)-catalysed alkylation of acetanilides with 3-buten-2-one: synthesis and key insights into the mechanism through DFT calculations

Beilstein Journal of Organic Chemistry, 2018
Traditional, established palladium cross-coupling procedures are widely applied in complex molecule synthesis; however, there is a significant disadvantage in the requirement for pre-functionalised substrates (commonly halides/triflates).
Andrew Kenny, Alba Pisarello, Arron Bird, Paula G. Chirila, Alex Hamilton, Christopher J. Whiteoak   +5 more
doaj   +1 more source

Simple synthesis of pyrrolo[3,2-e]indole-1-carbonitriles

Beilstein Journal of Organic Chemistry, 2013
Alkylation of 5-nitroindol-4-ylacetonitriles with ethyl chloroacetate, α-halomethyl ketones, and chloroacetonitrile followed by a treatment of the products with chlorotrimethylsilane in the presence of DBU gives 1-cyanopyrrolo[3,2-e]indoles substituted ...
Adam Trawczyński, Robert Bujok, Zbigniew Wróbel, Krzysztof Wojciechowski   +3 more
doaj   +1 more source

Catalytic performance of MCM-22 zeolite for alkylation of toluene with methanol

, 2004
MCM-22 zeolite with mid-strong acidity and openings of 10-membered ring channels may obtain a high catalytic activity and selectivity for alkylation of toluene with methanol.
Kong, DJ, Zhu, ZR, Li, C, Chen, QL, Zhu, W   +4 more
core   +1 more source

Direct trifluoroethylation of carbonyl sulfoxonium ylides using hypervalent iodine compounds

Beilstein Journal of Organic Chemistry
A novel study on the hypervalent iodine-mediated polyfluoroalkylation of sulfoxonium ylides was developed. Sulfoxonium ylides, known for their versatility and stability, are promising substrates for numerous transformations in synthetic chemistry.
Radell Echemendía, Carlee A. Montgomery, Fabio Cuzzucoli, Antonio C. B. Burtoloso, Graham K. Murphy   +4 more
doaj   +1 more source

Benzene alkylation with propane over metal modified HZSM-5

, 2007
Propane alkylation with benzene over modified zeolite catalysts is one of the good ways for propane utilization. The catalytic performance over various metal modified HZSM-5 catalysts was studied.
Sun, Xinde, 刘中民, Huang, Xueqing, Liu, Zhongmin, Zhu, Shukui   +4 more
core   +1 more source