Results 51 to 60 of about 9,914 (265)

Transition-metal-free synthesis of 3-sulfenylated chromones via KIO3-catalyzed radical C(sp2)–H sulfenylation

Beilstein Journal of Organic Chemistry, 2017
The reactions between o-hydroxylphenyl-functionalized enaminones and sulfonyl hydrazines providing 3-sulfenylated chromones via domino chromone ring construction and C(sp2)–H bond sulfenylation have been achieved under transition-metal-free conditions by
Yanhui Guo, Shanshan Zhong, Li Wei, Jie-Ping Wan   +3 more
doaj   +1 more source

Reactivity of 4-tert-Butyldimethylsiloxy-1,2,3,6-tetrahydropyridines with Hydrazines

Molecules, 2006
The reactivity of 6-(nitrophenyl or trimethoxyphenyl)-4-tert-butyldimethyl- siloxy-1,2,3,6-tetrahydropyridine derivatives with hydrazines under acid conditions is described.
Manuel Medarde, Fernando Tomé, Pilar Puebla, Esther Caballero, Javier Figueroa   +4 more
doaj   +1 more source

FeO(OH)@C‐Catalyzed Selective Hydrazine Substitution of p‐Nitro‐Aryl Fluorides and their Application for the Synthesis of Phthalazinones

ChemistryOpen, 2022
An efficient hydrazine substitution of p‐nitro‐aryl fluorides with hydrazine hydrates catalyzed by FeO(OH)@C nanoparticles is described. This hydrazine substitutions of p‐nitro‐aryl fluorides bearing electron‐withdrawing groups proceeded efficiently with
Dingzhong Li, Wensheng Zhang, Dr. Longzhi Zhu, Prof. Dr. Shuang‐Feng Yin, Prof. Dr. Nobuaki Kambe, Prof. Dr. Renhua Qiu   +5 more
doaj   +1 more source

Intermolecular Alkyne Hydroaminations Involving 1,1-Disubstituted Hydrazines

, 2016
Two readily prepared catalysts have been developed for the hydroamination of alkynes by 1,1-disubstituted hydrazines. The catalyses are facile with terminal alkynes and some internal alkynes.
Aaron L. Odom (1482148), Changsheng Cao (2649628), Yanhui Shi (1907434)   +2 more
core   +1 more source

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

Flavin Catalysts in Organic Synthesis

Angewandte Chemie, EarlyView.
Flavins and their congeners are potent catalysts for organic synthesis inspired by enzymatic transformations. In addition to catalysis in the flavin ground state via covalent intermediates, the excited singlet and triplet states unlock applications including photooxidation, photoreduction, and energy transfer via sensitization.
Jan Freudenberg, Golo Storch
wiley   +2 more sources

Advances in Se Wide‐Bandgap Photovoltaics and TexSe1‐x SWIR Photodiodes

Advanced Science, EarlyView.
In this review, fundamental properties and current challenges in Se photovoltaics (PVs) for tandem and indoor PVs and TexSe1‐x alloys for short wave infrared photodiodes are discussed. A case is made for the practicality of elemental chalcogenide optoelectronics, and a pathway toward resolving the key challenges in these respective technologies is ...
Adam D. Alfieri, Deep Jariwala
wiley   +1 more source

1,4‐Brook Rearrangement of β‐Silyl Allylic Alcohols: Trisubstituted Alkenes by Copper‐Mediated Stereoretentive ipso‐Substitution Reactions

Angewandte Chemie, EarlyView.
To fully leverage the power of the ruthenium‐catalyzed trans‐hydrosilylation of propargyl alcohols, it was necessary to develop a practical and robust method for the activation of those products that carry the silyl group distal to the hydroxy substituent.
Paul Haf‐Moths, Jack L. Sutro, Alois Fürstner   +2 more
wiley   +2 more sources

TBAB-Catalyzed 1,6-Conjugate Sulfonylation of para-Quinone Methides: A Highly Efficient Approach to Unsymmetrical gem-Diarylmethyl Sulfones in Water

Molecules, 2020
A highly efficient sulfonylation of para-quinone methides with sulfonyl hydrazines in water has been developed on the basis of the mode involving a tetrabutyl ammonium bromide (TBAB)-promoted sulfa-1,6-conjugated addition pathway.
Zhang-Qin Liu, Peng-Sheng You, Liang-Dong Zhang, Da-Qing Liu, Sheng-Shu Liu, Xiao-Yu Guan   +5 more
doaj   +1 more source

Reversing Macrophage Immunometabolic Dysfunction in Prolonged Infections Via a Glutaminolysis‐Fueled Restoration‐Based Hierarchically Selective Therapeutic System

Advanced Science, EarlyView.
A hierarchically selective immunotherapeutic nanoplatform, mGls@HEV‐MTP, selectively restores macrophage immunocompetence through GLS1‐mediated restoration of glutaminolysis‐fueled anaplerosis. Concurrently, it renders Staphylococcus aureus (S. aureus) more readily recognizable to the metabolically reprogrammed macrophages, thereby facilitating ...
Weinan Yang, Zihao An, Honglu Cai, Congsun Li, Jiaxuan Zou, Wushi Cui, Wentao Chen, Tao Zhang, Shicheng Wang, Zizhan Su, Jian Xiao, Tao Sun, Bin Hu, Min Cheng, Zhongru Gou, Jianbin Xu, An Liu, Haobo Wu   +17 more
wiley   +1 more source