Results 61 to 70 of about 45,362 (276)

On the functionalization of benzo[e][2,1]thiazine

Beilstein Journal of Organic Chemistry, 2009
The reactions of benzo[e][2,1]thiazine-4-chloro-3-carbaldehydes 1 and benzo[e][2,1]thiazine-4-chloro-3-carbonitriles 2 with a number of oxidizing and reducing agents are reported.
Kirill Popov, Tatyana Volovnenko, Julian Volovenko   +2 more
doaj   +1 more source

Umpolung of Indoles: Triflic Acid-Mediated C3-Regioselective Hydroarylation of N-H Indoles [PDF]

, 2022
Nazarii Sabat, Weiping Zhou, Vincent Gandon, Xavier Guinchard, Guillaume Vincent   +4 more
openalex   +1 more source

A Generalized Approach for Distal C–H Arylation of Organic Building Blocks: Unveiling the Role of Counter Anion

Advanced Science, EarlyView.
We report a general strategy for meta‐selective C–H arylation using aryl iodides and a Pd(II)/Pd(IV) catalytic system guided by a removable directing group. DFT and experimental studies reveal that counter anion tuning (acetate to trifluoroacetate) significantly enhances selectivity.
Jagrit Grover, Gaurav Prakash, Astam Mandal, Devika Ghosh, Siddhartha Maiti, Claire Empel, Debabrata Maiti   +6 more
wiley   +1 more source

Chemical Synthesis of Pseudomonas aeruginosa, Staphylococcus aureus, and Acinetobacter baumannii Capsular Polysaccharide Fragments as Leads for Cross‐Protection

Angewandte Chemie, EarlyView.
A total of 16 chemically synthesized capsular polysaccharide (CPS) fragments related to Pseudomonas aeruginosa, Staphylococcus aureus, and Acinetobacter baumannii were analyzed by glycan microarray. Comparative screening revealed three conserved epitopes that act as cross‐protective vaccine lead candidates against multidrug‐resistant (MDR) bacterial ...
Amar Kumar Mishra, Emelie E. Reuber, Diksha Rai, Leif E. Sander, Julia Duerr, Simon Y. Graeber, Marcus A. Mall, Bettina C. Fries, Peter H. Seeberger, Suvarn S. Kulkarni   +9 more
wiley   +2 more sources

A Molecular Electron Density Theory Study of the Chemoselectivity, Regioselectivity, and Diastereofacial Selectivity in the Synthesis of an Anticancer Spiroisoxazoline derived from α-Santonin

Molecules, 2019
The [3 + 2] cycloaddition (32CA) reaction of an α-santonin derivative, which has an exocyclic C⁻C double bond, with p-bromophenyl nitrile oxide yielding only one spiroisoxazoline, has been studied within the molecular electron density theory ...
Luis R. Domingo, Mar Ríos-Gutiérrez, Nivedita Acharjee   +2 more
doaj   +1 more source

Hybridization of Homogeneous and Heterogeneous Catalysis to Develop a Novel Biocatalyst via Immobilization of Lipase on Surface Modified Mesoporous Silica Towards Biodiesel Synthesis Application

Advanced Energy and Sustainability Research, EarlyView.
The 3‐(methacryloyloxy)propyltrimethoxysilane surface functionalized SBA‐15 (MP‐SBA‐15) is used for the first time as a lipase carrier. The immobilized CAL‐B exhibits high thermal stability and superior catalytic activity. CAL‐B/SBA‐15 suggests that optimum hydrophobicity gives better catalytic activity.
Murugappan N., Ayumi Sato, Jiachen Ge, Arisa Yamada, Makoto Onaka, Yuki Nakamura, Masaru Ogura   +6 more
wiley   +1 more source

Copper‐Catalyzed Three‐Component Selective 1,4‐Amino Oxygenation of 1,3‐Dienes

Angewandte Chemie, EarlyView.
Enclosed is a copper‐catalyzed selective 1,4‐amino oxgenation of 1,3‐dienes with the presence of a strong Brønsted acid. This three‐component transformation offers a novel and powerful approach to construct (E)‐1,4‐allylic amino oxygenated motifs by the simultaneous installation of structurally diverse alkylamines and alcohols directly onto 1,3‐dienes.
Guangshou Feng, Maria K. Velopolcek, Qiu Wang   +2 more
wiley   +2 more sources

Regioselective Palmitoylation of 9-(2,3-Dihydroxy- propyl)adenine Catalyzed by a Glycopolymer-enzyme Conjugate

Molecules, 2016
The enzymatic regioselective monopalmitoylation of racemic 9-(2,3-dihydroxypropyl)- adenine (DHPA), an approved antiviral agent, has been performed by an immobilized form of Candida antarctica B lipase (CAL-B) using a 4:1 DMF/hexane mixture as the ...
Jana Brabcová, Jiří Blažek, Marcela Krečmerová, Jiří Vondrášek, Jose M. Palomo, Marie Zarevúcka   +5 more
doaj   +1 more source

Polymer-Supported-Cobalt-Catalyzed Regioselective Cyclotrimerization of Aryl Alkynes [PDF]

, 2021
Abhijit Sen, Takuma Sato, Aya Ohno, Heeyoel Baek, Atsuya Muranaka, Yoichi M. A. Yamada   +5 more
openalex   +1 more source

Regioselective synthesis of polygamma (γ) acid

RSC Advances, 2015
The oxidative polymerization of 6-amino-4-hydroxy-2-naphthalenesulfonic acid was carried out in an aqueous alkaline medium. The polymer showed uncommon multicolored emission behavior in DMSO, emitting blue, green, and yellow light at 405, 480, and 532 nm, respectively.
Dogan, Fatih, Temizkan, Kevser, Kaya, Ismet   +2 more
openaire   +4 more sources