Results 11 to 20 of about 797,239 (340)

Unified short syntheses of oxygenated tricyclic aromatic diterpenes by radical cyclization with a photoredox catalyst

Communications Chemistry, 2023
The biomimetic two-phase strategy employing polyene cyclization and subsequent oxidation/substitution is an effective approach for divergent syntheses of [6-6-6]-tricyclic diterpenes.
Riichi Hashimoto, Kengo Hanaya, Takeshi Sugai, Shuhei Higashibayashi   +3 more
doaj   +1 more source

Free radical 5-exo-dig cyclization as the key step in the synthesis of bis-butyrolactone natural products: experimental and theoretical studies [PDF]

, 2011
Radical cyclization reactions were performed by 5-exo-dig mode to yield cis-fused bicyclic systems, leading to the synthesis of bis-butyrolactone class of natural products.
Allinger, Baldwin, Beckwith, Beckwith, Beckwith, Blot, Cossy, Curtiss, Devoju Harinada Chary, Florian Achrainer, Gangavaram V. M. Sharma, Hendrik Zipse, Lii, Lii, Nagula Chandramouli, Sateesh Patrudu, Sharma, Sharma, Sharma, Sharma, Sharma, Sharma, Srikrishna, Yu   +23 more
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Predicting multidimensional distributive properties of hyperbranched polymer resulting from AB2 polymerization with substitution, cyclization and shielding [PDF]

, 2013
A deterministic mathematical model for the polymerization of hyperbranched molecules accounting for substitution, cyclization, and shielding effect has been developed as a system of nonlinear population balances.
Iedema, Piet D., Kryven, Ivan
core   +5 more sources

Sequence Dependence of Transcription Factor-Mediated DNA Looping [PDF]

, 2012
DNA is subject to large deformations in a wide range of biological processes. Two key examples illustrate how such deformations influence the readout of the genetic information: the sequestering of eukaryotic genes by nucleosomes, and DNA looping in ...
Barry, Bellomy, Bellomy, Brenowitz, Butler, Chen, Chen, Cloutier, Cloutier, Drew, Du, Echols, Edelman, Finzi, Frank, Garcia, Geggier, Han, Hirsh, Hogan, Hsieh, Jacobson, Krämer, Lewis, Lowary, Luger, Luijsterburg, Martin Lindén, Matthews, Mehta, Milstein, Morgan, Müller, Newman, Normanno, Oehler, Olson, Peters, Plischke, Ptashne, Rippe, Rob Phillips, Rutkauskas, Saiz, Schafer, Schleif, Segall, Shimada, Stephanie Johnson, Swigon, Tolhuis, Towles, Vanzi, Villa, Watson, Whitson, Whitson, Widom, Wong, Xu, Yin, Zhan, Zhang   +62 more
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Urine Metabolite Profiling of Human Colorectal Cancer by Capillary Electrophoresis Mass Spectrometry Based on MRB

Gastroenterology Research and Practice, 2012
Aim. The study was to investigate the metabolic profile of urine metabolites and to elucidate their clinical significance in patients with colorectal cancer. Methods. Colorectal cancers from early stage and advanced stage were used in this study.
Jin-Lian Chen, Jing Fan, Liu-Shui Yan, Hui-Qin Guo, Jing-Jing Xiong, Yan Ren, Jun-Duo Hu   +6 more
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CYCLIZATION AND HYDROGENATION OF (+)-CITRONELLAL TO MENTHOLS OVER ZnBr₂ AND Ni CATALYSTS SUPPORTED ON γ-Al₂O₃

Indonesian Journal of Chemistry, 2010
Two steps transformation of (+)-citronellal, cyclization and hydrogenation, on ZnBr2/γ-Al2O3 and Ni/γ-Al2O3 catalyst have been realized with the selectivity to cyclization products (isopulegols) was very high (yield up to ~92.58%) over ZnBr2/γ-Al2O3 ...
Elvina Dhiaul Iftitah, M. Muchalal, Wega Trisunaryanti, Ria Armunanto   +3 more
doaj   +1 more source

Carbocations and the Complex Flavor and Bouquet of Wine: Mechanistic Aspects of Terpene Biosynthesis in Wine Grapes. [PDF]

, 2015
Computational chemistry approaches for studying the formation of terpenes/terpenoids in wines are presented, using five particular terpenes/terpenoids (1,8-cineole, α-ylangene, botrydial, rotundone, and the wine lactone), volatile compounds (or their ...
Pemberton, Ryan P, Tantillo, Dean J, Wedler, Henry B   +2 more
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Cyclization mechanism and kinetics of poly(acrylonitrile-co-2-acrylamido-2-methylpropane sulfonic acid) copolymer investigated by FTIR spectroscopy

Polymer Testing, 2021
Cyclization reaction of poly(acrylonitrile-co-2-acrylamido-2-methylpropane sulfonic acid) [P(AN-co-AMPS)] copolymer during thermal oxidative stabilization (TOS) process was investigated by FTIR and two dimensional (2D) correlation analysis technique. The
Zhipeng He, Huichao Liu, Guang Yang, Chi Jiang, Muwei Ji, Jiali Yu, Mingliang Wang, Caizhen Zhu, Jian Xu   +8 more
doaj  

Synthesis and investigation on optical and electrochemical properties of 2,4-diaryl-9-chloro-5,6,7,8-tetrahydroacridines

Beilstein Journal of Organic Chemistry, 2021
A facile synthesis of 2,4-diaryl-9-chloro-5,6,7,8-tetrahydroacridine derivatives is reported which is based on POCl3-mediated cyclodehydration followed by double Suzuki–Miyaura cross-coupling.
Najeh Tka, Mohamed Adnene Hadj Ayed, Mourad Ben Braiek, Mahjoub Jabli, Peter Langer   +4 more
doaj   +1 more source

Iodoarene-Catalyzed Cyclizations of Unsaturated Amides [PDF]

, 2015
The cyclization of N-alkenylamides catalyzed by iodoarenes under oxidative conditions is presented. Five-, six-, and seven-membered rings with a range of substitutions can be prepared by this route.
Ali Alhalib, Bode H. B., Degnan B. M., Dohi T., Dohi T., Fujita M., Fujita M., Guilbault A.-A., Guilbault A.-A., Hamnett D. J., Kong A., Mizar P., Moon N. G., Murai T., Ngatimin M., Parra A., Richardson R. D., Rodríguez A., Rodríguez A., Shimogaki M., Somaia Kamouka, Suzuki S., Uyanik M., Uyanik M., Wesley J. Moran, Wu H., Yan J., Zhdankin V. V., Zheng Z. S., Zhong W., Zhou Z.-S.   +30 more
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