Results 61 to 70 of about 43,522 (243)

Remapping the Synthetic Landscape of α‐Tertiary Alkylamines via Dual‐Functional Catechol

Angewandte Chemie, EarlyView.
A three‐component assembly strategy has been developed for the modular synthesis of hindered α‐tertiary aliphatic amines from readily available precursors through unlocking the dual role of catechol. The practicality of this methodology has been demonstrated in over 90 examples, including compounds that are otherwise difficult to access, along with ...
Chen‐Yan Cai, Yuzuru Kanda, Tian Qin
wiley   +2 more sources

Modular Access to α‐Tertiary Amines: Electrochemical Tandem Di‐Functionalization of Olefins With Ammonia Surrogates and Amino Acids

Angewandte Chemie, EarlyView.
A metal‐ and oxidant‐free electrochemical multicomponent di‐functionalization strategy that rapidly converts 1,1‐disubstituted alkenes into α‐tertiary primary amines with simultaneous installation of bio‐relevant sulfur or selenium motifs was devised for late‐stage functionalization. ABSTRACT Quaternary carbon centers, especially those bearing nitrogen,
Adrija Ghosh, Tarun, Sven Erik Peters, Lutz Ackermann, Debasis Banerjee   +4 more
wiley   +2 more sources

Nitro Reduction‐Based RNA Control and Ultrafast Release

Angewandte Chemie, EarlyView.
A chemical RNA caging–uncaging strategy based on nitro reduction is described. Nitroaryl groups introduced via acylation temporarily block the functions of diverse RNAs in vitro and in living cells. Treatment with a diboronic acid–bipyridine mixture rapidly reduces the nitro groups, releasing RNAs and restoring their activity.
Yiran Zhao, Senfeng Zhang, Junsong Guo, Tuan‐Khoa Kha, Song Chen, Chunyi Hu, Ru‐Yi Zhu   +6 more
wiley   +2 more sources

Selective oxidation of benzyl alcohol to benzaldehyde over Ce-modified algal-based biochar

能源环境保护
As an important chemical intermediate, benzaldehyde is widely used in medicine and fine chemicals. To address pollution in traditional benzaldehyde synthesis, preparing benzaldehyde through the catalytic oxidation of benzyl alcohol holds significant ...
Ying HE, Chuan YUAN, Qifan LING, Bin CAO, Sirong HE, Shuang WANG   +5 more
doaj   +1 more source

A Tert‐Alkyl Terephthalate Derivative as a Universal Degradable Unit for Condensation Polymers

Angewandte Chemie, EarlyView.
A sterically bulky dicarboxylic acid core bearing a tertiary alkyl ester enables photocatalytic C─O bond cleavage via generation of a stabilized tertiary alkyl radical. Incorporated into polyarylate, polyurethane, and polyester, this universal trigger facilitates efficient degradation under identical conditions (up to 99% within 2–4 h). Remarkably, the
Yasuyuki Nitta, Ryosuke Nishikuma, Souya Kouda, Masatoshi Ohyama, Meiki Shinoda, Tsuyoshi Taniguchi, Takashi Koike, Takashi Nishikata   +7 more
wiley   +1 more source

Functional and Network PHAs via Stereoselective Polymerization and Tailored Post‐Transformation

Angewandte Chemie, EarlyView.
Catalyst‐controlled stereoselective (co)polymerization of functionalized lactones produces vinyl‐, allyl‐, and propargyl‐functionalized PHAs with high syndiotacticity and a broad applicable temperature window, which can be further transformed into crosslinked PHA thermosets, elastic supramolecular networks, and functional grafts. ABSTRACT Incorporation
Ruirui Li, Yingluo Zhao, Jun‐Jie Tian, Ethan C. Quinn, Yunpeng Gao, Maëlle T. Gace, Eugene Y.‐X. Chen   +6 more
wiley   +2 more sources

Benzyl alcohol oxidation with Pd-Zn/TiO2: computational and experimental studies

Science and Technology of Advanced Materials, 2019
Pd–Zn/TiO2 catalysts containing 1 wt% total metal loading, but with different Pd to Zn ratios, were prepared using a modified impregnation method and tested in the solvent-free aerobic oxidation of benzyl alcohol.
Ewa Nowicka, Sultan Althahban, Tom D. Leah, Greg Shaw, David Morgan, Christopher J. Kiely, Alberto Roldan, Graham J. Hutchings   +7 more
doaj   +1 more source

Thermal control of the defunctionalization of supported Au25(glutathione)18 catalysts for benzyl alcohol oxidation

Beilstein Journal of Nanotechnology, 2019
Au25(SG)18 (SG – glutathione) clusters deposited on ZrO2 nanoparticles have been used as a catalyst for benzyl alcohol oxidation. Calcination was performed at different temperatures to study the ligand and particle size effect on the catalytic activity ...
Zahraa Shahin, Hyewon Ji, Rodica Chiriac, Nadine Essayem, Franck Rataboul, Aude Demessence   +5 more
doaj   +1 more source

Synthesis of Cycloveratrylene Macrocycles and Benzyl Oligomers Catalysed by Bentonite under Microwave/Infrared and Solvent-Free Conditions

Molecules, 2013
Tonsil Actisil FF, which is a commercial bentonitic clay, promotes the formation of cycloveratrylene macrocycles and benzyl oligomers from the corresponding benzyl alcohols in good yields under microwave heating and infrared irradiation in the absence of
Manuel Salmón, Eréndira García-Ríos, José Antonio Morales-Serna, Yolanda Marina Vargas-Rodriguez, Carlos Abel Maya-Vega, Inés Nicolás-Vázquez, Omar Valencia-Vázquez, René Miranda   +7 more
doaj   +1 more source

Identification of Active Phase for Selective Oxidation of Benzyl Alcohol with Molecular Oxygen Catalyzed by Copper-Manganese Oxide Nanoparticles

Journal of Chemistry, 2013
Catalytic activity of copper-manganese mixed oxide nanoparticles (Cu/Mn = 1 : 2) prepared by coprecipitation method has been studied for selective oxidation of benzyl alcohol using molecular oxygen as an oxidizing agent.
Roushown Ali, S. F. Adil, Abdulrahman Al-warthan, M. Rafiq H. Siddiqui   +3 more
doaj   +1 more source