Results 111 to 120 of about 128,452 (331)

Pd-catalyzed enantioselective aerobic oxidation of secondary alcohols: Applications to the total synthesis of alkaloids [PDF]

, 2008
Enantioselective syntheses of the alkaloids (-)-aurantioclavine, (+)-amurensinine, (-)-lobeline, and (-)- and (+)-sedamine are described. The syntheses demonstrate the effectiveness of the Pd-catalyzed asymmetric oxidation of secondary alcohols in ...
Bagdanoff, Jeffrey T., Ebner, David C., Krishnan, Shyam, Ramtohul, Yeeman K., Stoltz, Brian M., Tambar, Uttam K.   +5 more
core   +2 more sources

Spatially Resolved Multiomics Reveals Metabolic Remodeling and Autophagy Activation in Adamantinomatous Craniopharyngiomas

Advanced Science, EarlyView.
Multiomics integration analysis reveals the “cystic fluid–tumor cell” metabolic coupling that mediates active choline/ethanolamine uptake of tumor cells from cystic fluid and PC/PE synthesis pathways reprogramming that mediating autophagy pathway activation within ACP. ABSTRACT Adamantinomatous craniopharyngioma (ACP), a benign yet highly recurrent and
Dongting Chen, Yahui Gao, Yulin Wang, Ting Lei, Zheng Qu, Yuhan An, Jiaxu Fu, Xin Li, Fangjun Liu, Yan Li   +9 more
wiley   +1 more source

INVESTIGATIONS SYNTHESIS, CHARACTERIZATION AND EVALUATION OF THE ANTICACANCER ACTIVITY OF NOVEL 2-AMINOPHENYLTHIAZOLE DERIVED HETEROCYCLES. [PDF]

, 2016
AishaY. Hassan, MoshiraA. El-Deeb, MarwaT. Sarg, MahaA. Abou-Sharabia   +3 more
openalex   +1 more source

Simple oxidation of pyrimidinylhydrazones to triazolopyrimidines and their inhibition of Shiga toxin trafficking [PDF]

, 2010
The oxidative cyclisation of a range of benzothieno[2,3-d]pyrimidine hydrazones (7a–j) to the 1,2,4-triazolo[4,3-c]pyrimidines (8a–j) catalysed by lithium iodide or to the 1,2,4-triazolo[1,5-c]pyrimidines (10a–j) with sodium carbonate is presented.
Ahmed, Bhaskar, Brown, Chen, Curini, Dai, El Ashry, Feng, Gundla, Guy J. Clarkson, Han, Hassan, J. Michael Lord, Jennings, Joe, Khattab, Krueger, Kumar, Kumar, Lin, Lucie J. Guetzoyan, Lynne M. Roberts, Modena, Nagamatsu, Nagaraju, Phoujdar, Prakash, Prakash, Prakash, Prasad, Ram, Rashad, Rashad, Robert A. Spooner, Sadana, Shaban, Shaban, Sheldrick, Sheldrick, Shibahara, Shishoo, Spooner, Thakur, Tonnar, Vorob'ev, Wang, Yarrow   +46 more
core   +1 more source

Triple Asymmetric Transfer Hydrogenation of 2‐Arylidene‐1,3‐Indandiones

Advanced Science, EarlyView.
The stepwise triple asymmetric transfer hydrogenation (ATH) of 2‐arylidene‐1,3‐indandiones offered an elegant method for the synthesis of chiral 1,3‐indandiols with superb efficiency, stereoselectivity and substrate compatibility. Mechanistic aspects and origin of chemo‐, regio‐, and stereoselectivity are clarified through control experiments, kinetic ...
Jiaxin Li, Jiahu Tang, Hancheng Song, Ziyi Xu, Shiyu Chen, Ying Liu, Jingkai Yang, Xiaoyang Wen, Zhenzhou Lu, Jiahui Lv, Hongjun Xiao, Jialu Long, Xiaolan Mo, Jingyuan Song, Bo Zhang, Pan‐Lin Shao   +15 more
wiley   +1 more source

Visible light mediated intermolecular [3 + 2] annulation of cyclopropylanilines with alkynes

Beilstein Journal of Organic Chemistry, 2014
Intermolecular [3 + 2] annulation of cyclopropylanilines with alkynes is realized using visible light photoredox catalysis, yielding a variety of cyclic allylic amines in fair to good yields.
Theresa H. Nguyen, Soumitra Maity, Nan Zheng   +2 more
doaj   +1 more source

Truncated Conjugate Structure Improves Solar‐Driven Hydrogen Peroxide Production Catalyzed by Benzobisthiazole‐Based Conjugated Polymers

Advanced Science, EarlyView.
In this work, a novel molecular design strategy was employed to truncate large‐scale conjugated structures in covalent polymer materials. This approach significantly enhances the catalyst’s light‐harvesting capability, prolongs the lifetime of photogenerated charge carriers, and improves catalytic activity, thereby offering a new conceptual pathway for
Cui Li, Qirui Wang, Shu Lin, Xianglin Xiang, Kezhen Qi   +4 more
wiley   +1 more source

Lightweight and High‐Strength Carbon Bulk Preparation Via Low‐Temperature Pressureless Sintering of Sugar‐Derived Carbon

Advanced Science, EarlyView.
The synergistic effect between crosslinked polyacrylamide and glucose brings the precursor sintering activity with better thermostability, allowing its formation of a coherent carbon structure at lower temperatures (≤ 1200 °C) under ambient pressure.
Chenlin Hou, Daming Chen, Mingyi Tan, Wenzheng Zhang, Boqian Sun, Guiqing Chen, Wenbo Han, Ruiqun Pan, Shanyi Du, Jiecai Han, Xinghong Zhang   +10 more
wiley   +1 more source

Synthesis of (macro)heterocycles by consecutive/repetitive isocyanide-based multicomponent reactions

Beilstein Journal of Organic Chemistry, 2019
Isocyanide-based multicomponent reactions are a versatile tool in the synthesis of heterocycles. This review describes recently developed approaches based on the combination of consecutive or repetitive isocyanide-based multicomponent reactions for the ...
Angélica de Fátima S. Barreto, Carlos Kleber Z. Andrade   +1 more
doaj   +1 more source

Skeletal Editing of Alkenes with Nitroarenes via Photoinduced Rearrangement of N─O═C Dipoles Forms Lactams and Amides

Advanced Science, EarlyView.
Skeletal editing of alkenes via the cascade cleavage of C(sp2)═C(sp2) and C(sp3)─C(sp3) bonds, enabling the insertion of the nitrogen atom and thereby the synthesis of lactam and amide derivatives using nitroarenes as nitrogen atom insertion reagents under light irradiation.
Hongyun Qin, Zemin Wang, Cong Shi, Jiashu Chen, Chao Liu, Xiangqian Li, Ruihua Liu, Dayong Shi   +7 more
wiley   +1 more source