Results 141 to 150 of about 44,314 (270)

New Quinazolin-4(3H)-One Derivatives Incorporating Isoxazole Moiety as Antioxidant Agents: Synthesis, Structural Characterization, and Theoretical DFT Mechanistic Study

Pharmaceuticals
Background: This research centers on the development and spectroscopic characterization of new quinazolin-4(3H)-one-isoxazole derivatives (5a–e). The aim was to investigate the regioselectivity of the 1,3-dipolar cycloaddition involving arylnitriloxides ...
Yassine Rhazi, Riham Sghyar, Noemi Deak, Bouchra Es-Sounni, Bouchra Rossafi, Albert Soran, Mustapha Laghmari, Azize Arzine, Asmae Nakkabi, Khalil Hammani, Samir Chtita, Mohammed M. Alanazi, Gabriela Nemes, Mohamed El. Yazidi   +13 more
doaj   +1 more source

Visible-Light-Mediated Catalyst-Free [2+2] Cycloaddition Reaction for Dihydrocyclobuta[b]naphthalene-3,8-diones Synthesis under Mild Conditions. [PDF]

Molecules, 2023
Tan HB, Zhou JY, Liu YS, Lei T, Wang SY, Hu SS, Zhang X, Xu ZG, Tang DY, Chen ZZ, Wang BC.   +10 more
europepmc   +1 more source

Generation and Reaction of Tungsten-Containing Carbonyl Ylides:  [3 + 2]-Cycloaddition Reaction with Electron-Rich Alkenes

, 2016
Novel tungsten-containing carbonyl ylides 7, generated by the reaction of the o-alkynylphenyl carbonyl derivatives 1 with a catalytic amount of W(CO)5(thf), reacted with alkenes to give polycyclic compounds 5 through [3 + 2]-cycloaddition reaction ...
Hiroyuki Kusama (1925068), Jun Takaya (1627189), Hideaki Funami (2337568), Yoshihiro Hara (2691667), Nobuharu Iwasawa (1627195), Masahide Shido (2691670)   +5 more
core   +1 more source

Halogen Bonding in the Decoration of Secondary Coordination Sphere of Zinc(II) and Cadmium(II) Complexes: Catalytic Application in Cycloaddition Reaction of CO₂ with Epoxides. [PDF]

ACS Omega, 2023
Aliyeva VA, Paninho AB, Nunes AVM, Karmakar A, Gurbanov AV, Rutigliano AR, Gallo E, Mahmudov KT, Pombeiro AJL.   +8 more
europepmc   +1 more source

On-Surface Azide-Alkyne Cycloaddition Reaction: Does It Click with Ruthenium Catalysts? [PDF]

Langmuir, 2022
Li T, Dief EM, Kalužná Z, MacGregor M, Foroutan-Nejad C, Darwish N.   +5 more
europepmc   +1 more source

Toward Chromoselective Transformations in Biological Systems: Perspectives and Challenges

Angewandte Chemie International Edition, EarlyView.
Controlling biological systems with small‐molecule chromophores has evolved into a powerful strategy and is applied from chemical biology to medicine. However, the complexity of in vivo systems cannot be matched by a single wavelength of light. Developing methods to combine and individually control multiple chromophores is crucial.
Nadja A. Simeth
wiley   +1 more source

An Efficient Synthesis of Naphtho[2,3-b]furan-4,9-diones via Visible-Light-Mediated [3+2] Cycloaddition Reaction. [PDF]

Molecules, 2023
Tan H, Qi Z, Yu Y, Zhang X, Xiang Y, Huang J, Xu Z, Tang D, Chen Z, Wang B.   +9 more
europepmc   +1 more source

Recent advances in the application of [2 + 2] cycloaddition in the chemical synthesis of cyclobutane-containing natural products

Natural Products and Bioprospecting
Cyclobutanes are distributed widely in a large class of natural products featuring diverse pharmaceutical activities and intricate structural frameworks.
Song-Yu Hou, Bing-Chao Yan, Han-Dong Sun, Pema-Tenzin Puno   +3 more
doaj   +1 more source

Quantum Chemical Study of the Cycloaddition Reaction of Tropone with 1,1-Diethoxyethene Catalyzed by B(C₆F₅)₃ or BPh₃. [PDF]

ACS Omega, 2023
Sakata K, Suzuki S, Sugimoto T, Yoshikawa T.   +3 more
europepmc   +1 more source

Evaluation of antibiofilm properties of dehydroacetic acid (DHA) grafted spiro-oxindolopyrrolidines synthesized via multicomponent 1,3-dipolar cycloaddition reaction. [PDF]

Sci Rep, 2023
Suresh Babu AR, Sharma A, Athira MP, Alajangi HK, Naresh Raj AR, Gartia J, Singh G, Barnwal RP.   +7 more
europepmc   +1 more source