Results 91 to 100 of about 82,507 (282)

Exploring endoperoxides as a new entry for the synthesis of branched azasugars

Beilstein Journal of Organic Chemistry, 2017
A new class of nitrogen-containing endoperoxides were synthesised by a photochemical [4 + 2]-cycloaddition between a diene and singlet oxygen. The endoperoxides were dihydroxylated and protected to provide a series of endoperoxide building blocks for ...
Svenja Domeyer, Mark Bjerregaard, Henrik Johansson, Daniel Sejer Pedersen   +3 more
doaj   +1 more source

Enantioselective Copper-Catalyzed [3+3] Cycloaddition of Azomethine Ylides with Azomethine Imines

, 2013
Enantioselective Copper-Catalyzed [3+3] Cycloaddition of Azomethine Ylides with Azomethine ...
Li, Zhen, Hu, Xiang-Ping, Na, Risong, Jiang, Hui, Liu, Honglei, Yu, Hao, Zhang, Lei, 胡向平, Hongchao Guo, Wu, Yang, Wang, Bo, Xiao, Yumei, Zhu, Fu-Lin, Wang, Min, Guo, Hongchao   +14 more
core   +1 more source

Electrochemically Driven Regioselective Radical Functionalization of Allenes: Scope and Mechanistic Insights

Advanced Science, EarlyView.
Allenes emerge as powerful platforms for electrochemical functionalization through radical pathways. Selective radical addition at the central carbon triggers anodic oxidation and intramolecular cyclization, enabling efficient synthesis of oxazolines and oxazolidine‐2‐imines without external oxidants.
Pranjal Pyne, Prateek Saini, Rohel Hoque, Shivam Pandey, Srinivasan Ramakrishnan, Chandra M. R. Volla   +5 more
wiley   +1 more source

High-level Computational Study of the Site-, Facial- and Stereoselectivities for the Diels-Alder Reaction Between o-Benzoquinone and Norbornadiene

Molecules, 2000
Ab initio and DFT quantum chemical calculations have been applied to a study of the Diels-Alder reaction of o-benzoquinone as diene and norbornadiene as dienophile.
Ronald N. Warrener, Martin R. Johnston, Davor Margetic   +2 more
doaj   +1 more source

PHOTOCHEMICAL CYCLOADDITION OF OLEFINS TO AROMATIC-COMPOUNDS .4. ON THE MECHANISM OF THE PHOTOCHEMICAL META-CYCLOADDITION

, 1982
Mattay J, RUNSINK J, LEISMANN H, SCHARF HD. PHOTOCHEMICAL CYCLOADDITION OF OLEFINS TO AROMATIC-COMPOUNDS .4. ON THE MECHANISM OF THE PHOTOCHEMICAL META-CYCLOADDITION. Tetrahedron Letters.
Mattay, Jochen, Jochen Mattay, LEISMANN, H, SCHARF, HD, Jan Runsink, Hans-Dieter Scharf, Hans Leismann, RUNSINK, J   +7 more
core   +1 more source

Toward Personalized Theranostics: A Modular PET Platform for Antibody‐Based Imaging and Therapy

Advanced Science, EarlyView.
This modular, site‐specific antibody platform enables customizable conjugates for PET imaging and therapy. Interchangeable payloads – including radiometals, cytotoxics, and fluorophores – support adaptable, multimodal applications with limited off‐target effects. In vivo, the DFO/DOTAGA bischelate immunoconjugate provided clear tumor delineation in PET/
Delphine Vivier, Megane Grah Kple, Julen Ariztia, Marion Leroux, Mathieu Moreau, Michael Claron, Maxime Cheveau, Adam Laouafa, Agnieszka Kownacka, Camille Petitot, John Simonet, Alexandre M. M. Dias, Sophie Poty, Charles Truillet, Bertrand Collin, Alexandra Oudot, Franck Denat   +16 more
wiley   +1 more source

[8+2] Cycloaddition reactions in organic synthesis

, 2008
Higher-order cycloaddition reactions offer great promise as a facile method for the synthesis of medium-sized ring systems. [8+2] Cycloaddition reactions are especially attractive in this regard.
Gopalakrishnan Abhilash, K., Nair, Vijay
core   +1 more source

CUCURBITURIL-INDUCED 1,3-DIPOLAR CYCLOADDITION.

, 1986
CUCURBITURIL-INDUCED 1,3-DIPOLAR ...
MITA. ADHYA (7978196)
core   +3 more sources

Cobalt‐Catalyzed Asymmetric Construction of Boron Stereocenters With C–N Axial Chirality

Advanced Science, EarlyView.
A cobalt/Salox‐catalyzed one‐pot annulation enables enantioselective formation of B‐stereogenic centers and C─N axial chirality via C─H/N─H annulation, affording diverse fluorescent products with high stereocontrol and optoelectronic potential. ABSTRACT The efficient construction of boron stereogenic centers alongside axial chirality remains a ...
Subramani Kumaran, Harihara Subramanian Ravi Sankar, Pritam Maity, J. Richard Premkumar, Abir Das, Basker Sundararaju   +5 more
wiley   +1 more source

Alternating Shear Force of Respiration Regulates Cell Interactions of Fibroblasts and Macrophages to Promote Soft Tissue Integration of Chest Wall Polyetheretherketone Implants

Advanced Science, EarlyView.
Given that PEEK chest wall implants induce shear force at the soft tissue‐implant interface due to respiratory motion in the early in vivo post‐implantation stage. We confirmed that this mechanical stimulus triggers the PIEZO1/ITGB1/YAP1 signalling axis in L929 and the STAT6/p‐STAT6 pathway in RAW264.7, which in turn mediates adhesion and migration of ...
Rou Huang, Yangfan Huo, Jin Liu, Sida Liu, Minghai Ma, Hao Guo, Yuanquan Zhang, Xing Li, Xiao Liang, Jiawei Xiu, Ying Sun, Lijun Huang, Xiaolong Yan, Weiwei Wu, Lei Wang   +14 more
wiley   +1 more source