Results 81 to 90 of about 2,873,864 (246)

Intramolecular Schmidt Reaction: Applications in Natural Product Synthesis

CHIMIA, 2006
The intramolecular Schmidt reaction was first described at the beginning of the 1990s and rapidly proved to be a powerful tool for the fast assembly of complex nitrogen-containing heterocycles.
Erich Nyfeler, Philippe Renaud
doaj   +1 more source

Tuneable access to indole, indolone, and cinnoline derivatives from a common 1,4-diketone Michael acceptor

Beilstein Journal of Organic Chemistry, 2020
A convergent strategy is reported for the construction of nitrogen-containing heterocycles from common substrates: 1,4-diketones and primary amines.
Dalel El-Marrouki, Sabrina Touchet, Abderrahmen Abdelli, Hédi M’Rabet, Mohamed Lotfi Efrit, Philippe C. Gros   +5 more
doaj   +1 more source

Beyond Conventional: A Review of Phytochemical‐Hydrogel Systems Enhanced by AI and 3D Printing for Chronic Wound Management

Advanced Science, EarlyView.
This review systematically bridges chronic wound pathology with natural phytochemical hydrogel therapeutics. A pathology‐to‐phytochemical mechanistic mapping framework is established, linking specific wound hallmarks to targeted phytochemical interventions.
Yitao Zhou, Xing Liu, Cuiyi Wang, Xiaoxuan Zhao, Pengrun Zhang, Jingjing Gu, Qiuhua Sun, Malcolm Xing, Yeqin Yang   +8 more
wiley   +1 more source

Direct Access to Chiral Piperidines by Enantioselective HAT‐Initiated C(sp3)─H Oxidation

Angewandte Chemie, EarlyView.
The direct desymmetrization of piperidines is achieved through manganese‐catalyzed enantioselective α‐C(sp3)─H oxidation with hydrogen peroxide, affording versatile chiral N,O‐acetals in good yields and with high enantio‐ and diastereoselectivity. These intermediates provide access to diverse functionalized piperidines with retention of chirality ...
Sethuraman Muthuramalingam, Josep M. Luis, Arnau Call, Quentin Lefebvre, Matthew S. Sigman, Miquel Costas   +5 more
wiley   +2 more sources

Synthesis of six membered heterocycles containing nitrogen or oxygen

, 2005
Six-membered heterocycles containing nitrogen and oxygen are prevalent in natural products and pharmaceutical drugs; hence efficient synthesis of these motifs is of great benefit.

core  

Radical Cyclization of Ynamides to Nitrogen Heterocycles

, 2022
An efficient radical cyclization of suitably functionalized ynamides to nitrogen-containing heterocycles is reported. Upon reaction with tributyltin hydride in the presence of catalytic amounts of AIBN in toluene at 80 °C, a range of ynamides bearing a N-
Blanchard, Nicolas, Zhang, Chunyang, Evano, Gwilherm   +2 more
core   +1 more source

Volatile Additives Engineering: A Trustworthy Morphology Control Strategy in Non‐Fullerene Organic Solar Cells

Advanced Science, EarlyView.
In this review, the classification and development history of the volatile solid and solvent additives are comprehensively summarized, the underlying mechanisms of morphology optimization are discussed, and a summary of volatile additive‐induced improvements in interfacial layer performance is provided.
Jianqiang Qin, Zhiqin Lai, Jiang‐Ling Shi, Zheng Xiao, Yuwei Duan, Zhiping Hu, Juan Du, Qiang Peng   +7 more
wiley   +1 more source

Unlocking Li/Mg‐Based Photochemical Nitration Platforms for Anticancer Drug Discovery

Advanced Science, EarlyView.
Two low‐toxicity light main‐group metal photochemical systems based on lithium and magnesium are constructed for selective C(sp2)‐H (di)nitration of anilines. The obtained dinitrated products exhibit anti‐HCC (hepatocellular carcinoma) and anti‐KYSE30 cell activities, holding promise as novel antitumor candidates.
Qian Wan, Jiali Zhu, Shanshuo Liu, Luchuan Ou, Huizhen Wang, Yu Lan, Zhou Dong, Yihang Bai, Wei Yang, Shihan Liu, Yan Qiao, Shi‐Jun Li, Zhigang Ren, Linbin Niu   +13 more
wiley   +1 more source

Enhancement of Dissymmetry Factors Through Axial Elongation of Hetero[n]helicenes

Angewandte Chemie, EarlyView.
A benzofuran scaffolding strategy enables the synthesis of hetero[9]‐, [12]‐, and [15]helicenes. Structural and chiroptical analyses demonstrate that systematic axial elongation increases helical distortion and significantly amplifies luminescence dissymmetry.
Jeppe S. Mogensen, Christoffer Bræstrup, Christoffer Warming, Georg I. Junker, Yann Lie, Mathias Hermann, Kurt V. Mikkelsen, Michael Pittelkow   +7 more
wiley   +2 more sources

Direct catalytic photodecarboxylative amination of carboxylic acids with diazirines: Divergent access to amines, hydrazines, and nitrogen-containing heterocycles [PDF]

Amines, hydrazines, and nitrogen-containing heterocycles are pivotal species in medicine, agriculture, fine chemicals, and materials. Diazirines have been recently reported to serve as versatile electrophilic amination reagents for the synthesis of ...
Justin, Lopchuk, Paresh, Athawale, Preeti, Chandrachud, Vishala, Maharaj   +3 more
core   +2 more sources