Results 41 to 50 of about 4,909 (228)

Involvement of the leaf-specific multidrug and toxic compound extrusion (MATE) transporter Nt-JAT2 in vacuolar sequestration of nicotine in Nicotiana tabacum [PDF]

, 2014
Alkaloids play a key role in higher plant defense against pathogens and herbivores. Following its biosynthesis in root tissues, nicotine, the major alkaloid of Nicotiana species, is translocated via xylem transport toward the accumulation sites, leaf ...
Goossens, Alain, Hayashida, Minaho, Ito, Shingo, Minami, Shota, Morita, Masahiko, Moriyama, Yoshinori, Moriyasu, Masataka, Omote, Hiroshi, Shitan, Nobukazu, Sugiyama, Akifumi, Takanashi, Kojiro, Yazaki, Kazufumi   +11 more
core   +4 more sources

Oxetanes: Recent Advances in Synthesis, Reactivity and Medicinal Chemistry [PDF]

, 2016
The 4-membered oxetane ring has been increasingly exploited for its behaviors, i.e. influence on physicochemical properties as a stable motif in medicinal chemistry, and propensity to undergo ring opening reactions as a synthetic intermediate.
Bull, JA, Croft, RA, Davis, OA, Doran, R, Morgan, KF   +4 more
core   +1 more source

Heterocycle-based bifunctional organocatalysts in asymmetric synthesis [PDF]

, 2016
Different chiral bifunctional organocatalysts derived from trans-cyclohexane-1,2-diamine bearing different types of guanidine units able to form-hydrogen bonding activation have been designed. Conformational rigid 2-aminobenzimidazoles bearing a tertiary
Gómez Bengoa, Enrique, Nájera, Carmen, Sansano, Jose M.   +2 more
core   +2 more sources

Natural Products Inspired Scaffold Diversification Leads to Unnatural Molecular Warhead and Covalent Strategy to Modulating Protein Function through Electrophilic Bromine Transfer

Advanced Science, EarlyView.
We report a new thiolate‐reactive α,α‐gem‐dibromo lactam warhead that activates transcription factor Nrf2 and demonstrates anti‐inflammatory activities, which have implications in cancer, neurodegeneration, and cardiovascular diseases. RNA‐seq illuminated detailed transcriptional profiles, and chemical reactions with cysteine‐containing compounds ...
Beau R. Brummel, Sofia Kokkaliari, Qiwen Gao, Jinjing Chen, Larissa Costa de Almeida, Srinivasarao Tenneti, Derek A. Leas, Eli Levit, Lewis S. Alexander, Khalil A. Abboud, Pingrong Wei, Michael D. Cameron, James R. Rocca, Ranjala Ratnayake, Donna D. Zhang, Hendrik Luesch, Robert W. Huigens III   +16 more
wiley   +1 more source

Chemical markers for the quality control of herbal medicines: an overview [PDF]

, 2008
Selection of chemical markers is crucial for the quality control of herbal medicines, including authentication of genuine species, harvesting the best quality raw materials, evaluation of post-harvesting handling, assessment of intermediates and finished
Songlin Li, Quanbin Han, Chunfeng Qiao, Jingzheng Song, Chuen Lung Cheng, Hongxi Xu   +5 more
core   +2 more sources

Controlling Photochromism of Donor‐Acceptor Stenhouse Adducts on Micro‐Dot Arrays Beyond Human‐Eyes Resolution for Dynamic Light Encryption

Advanced Science, EarlyView.
This study presents a micro‐dot array strategy for dynamic light encryption, utilizing DASA‐based photochromism with resolution beyond human‐eye capacity. By precisely controlling isomerization kinetics, the method reveals multi‐layered encrypted information under specific light irradiation, enhancing information security and anti‐counterfeiting ...
Hongtao Hu, Fanxi Sun, Hanjun Zhang, Xiao Wang, Gaolu Zhu, Jiayu Li, Mengyao Yang, Xu Deng, Yonghao Zheng, Chen Wei, Dongsheng Wang   +10 more
wiley   +1 more source

Quantification of N-acetylcysteamine activated methylmalonate incorporation into polyketide biosynthesis

Beilstein Journal of Organic Chemistry, 2013
Polyketides are biosynthesized through consecutive decarboxylative Claisen condensations between a carboxylic acid and differently substituted malonic acid thioesters, both tethered to the giant polyketide synthase enzymes.
Stephan Klopries, Uschi Sundermann, Frank Schulz   +2 more
doaj   +1 more source

Crystal and molecular structure of bis(8-phenylmenthyl) 2-(2-methyl-5-oxo-3-cyclohexen-1-yl)propandioate, C\u3csub\u3e42\u3c/sub\u3eH\u3csub\u3e54\u3c/sub\u3eO\u3csub\u3e5\u3c/sub\u3e• CH\u3csub\u3e3\u3c/sub\u3eCN [PDF]

, 2006
The X-ray crystal structure of the title compound, as crystallized from acetonitrile-water was determined. The relative stereochemistry of the cyclohexenone ring with respect to the 8-phenylmenthyl esters was determined.
Bennett, Dennis W., Chaudhury, Subhabrata, Donaldson, William, Haworth, Daniel T., Siddiquee, Tasneem A.   +4 more
core   +1 more source

Reverse Weak Polarity‐Induced Ordered Layer Control for Enhanced Second‐Harmonic Generation in Ultraviolet Nonlinear Optical Crystals

Advanced Science, EarlyView.
Reverse Weak Polarity‐Induced Ordered Layer Control strategy, optimizing the design of layered structures, has been successfully designed. By leveraging inhomogeneous field of units to replace isotropic fields of metal cations, polar layers realize controllable layer stacking via a “layer→linker→layer” polarity transfer.
Lingli Wu, Chensheng Lin, Bing‐Xuan Li, Huixin Fan, Lingfei Lv, Shunda Yang, Tao Yan, Min Luo   +7 more
wiley   +1 more source

Exploitation of knowledge databases in the synthesis of zinc(II) malonates with photo-sensitive and photo-insensitive N,N′-containing linkers

IUCrJ, 2018
Photoinitiated solid-state reactions are known to affect the physical properties of coordination polymers, such as fluorescence and sorption behaviour, and also afford extraordinary architectures (e.g. three-periodic structures with polyorganic ligands).
Ekaterina N. Zorina-Tikhonova, Aleksandr S. Chistyakov, Mikhail A. Kiskin, Aleksei A. Sidorov, Pavel V. Dorovatovskii, Yan V. Zubavichus, Eugenia D. Voronova, Ivan A. Godovikov, Alexander A. Korlyukov, Igor L. Eremenko, Anna V. Vologzhanina   +10 more
doaj   +1 more source