Results 31 to 40 of about 12,662 (287)

Triphenylphosphine Catalysed Facile Multicomponent Synthesis of 2-Amino-3-Cyano-6-Methyl-4-Aryl-4H-Pyrans [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2017
Triphenyl phosphine(PPh3), an efficient and reusable catalyst, catalysed the synthesis of 2-amino-3-cyano-6-methyl-4-aryl-4H-pyran-5-ethylcarboxylate derivatives by one-pot condensation of aromatic aldehydes, malononitrile and ethyl acetoacetate in EtOH ...
Harikrishnan Ramadoss, Hamzeh Kiyani, Syed Sheik Mansoor   +2 more
doaj  

Spiropyran modified micro-fluidic chip channels as photonically controlled self-indicating system for metal ion accumulation and release [PDF]

, 2009
In this paper, we show how through integrating the beneficial characteristics of micro-fluidic devices and spiropyrans dyes, a simple and very innovative chip configured as an on-line photonically controlled self-indicating system for metal ion ...
Attia, Baillet, Baillet, Baltussen, Basabe-Desmonts, Bowden, Brett Paull, Byrne, Byrne, Chibisov, Collins, Dalavoy, Demadrille, Dermot Diamond, Diamond, Dong, Duffy, Evans, Fernando Benito-Lopez, Garcia, Gorner, Hillborg, Inouye, Joensson, Johnson, Kim, Matsushima, Mirek Macka, Ng, Olah, Owen, Radu, Ren, Rosario, Sakata, Scarmagnani, Shao, Shao, Silvia Scarmagnani, Song, Stitzel, Suzuki, Theodoridis, Tian, Toepke, West, Wu, Yager, Yang, Young, Zarah Walsh, Zhang   +51 more
core   +1 more source

Convenient One-Pot Synthesis of Spirooxindole-4H-pyrans in the Presence of SBA-Pr-NH2 and Evaluation of their Urease Inhibitory Activities [PDF]

Journal of Nanostructures, 2012
A simple and efficient one-pot three-component synthesis of the biologically important spirooxindole-4H-pyrans was carried out by the reaction of isatin, activated methylene reagents, and 4- hydroxycoumarin in aqueous medium. SBA-Pr-NH2 was found to be
G. Mohammadi Ziarani, N. Hosseini Mohtasham, N. Lashgari, A. Badiei, M. Amanlou, R. Bazl   +5 more
doaj   +1 more source

Green Synthesis of 4H-Pyrans and 4H-Chromenes in Magnetized Distilled Water [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2023
An efficient, facile, and green synthesis of 4H-pyran and 4H-chromene derivatives in Magnetized Distilled Water (MDW) has been described. In this work, magnetized distilled water was applied as a green-promoting medium for a practical, and ...
Mohammad Bakherad, Ali Keivanloo, Hossein Rezaei, Amin Rezaeifard   +3 more
doaj   +1 more source

Transient absorption spectroscopy on spiropyran monolayers using nanosecond pump–probe Brewster angle reflectometry [PDF]

, 2013
Self-assembled monolayers of 11-(3’,3’-dimethyl-6,8-dinitrospiro[chromene-2,2’-indoline]-1’-yl) undecanoic acid (amphiphilic spiropyran) at the air–water interface are studied using Brewster angle reflectometry.
Aarts, Aznar, Balashev, Bernhard Siebenhofer, Bletz, Bohne, Christoph Nowak, Gabor, Gorelik, Gorelik, Henon, Hobley, Hobley, Hobley, Hobley, Hobley, Hobley, Hong Yan Song, Horii, Hönig, Hönig, Jonathan Hobley, Katz, Kawai, Kim, Liptay, Martin J. Lear, Matsumoto, Mecheri, Mo, Mo, Muir, Reeves, Rosario, Sasaki, Sergey Gorelik, Siebenhofer, Tachibana, Tamai, Wang, Yamashita   +40 more
core   +1 more source

Nano-SiO2 catalyzed three-component preparations of pyrano[2,3-d]pyrimidines, 4H-chromenes, and dihydropyrano[3,2-c]chromenes

Journal of Saudi Chemical Society, 2018
An efficient one-pot three-component procedure has been developed for the preparation of tetrahydrobenzo[b]pyrans, dihydropyrano[3,2-c]chromenes, and pyrano[2,3-d]pyrimidines using nano-SiO2 as catalyst in H2O at 70 °C.
Ebrahim Mollashahi, Mohammad Nikraftar
doaj   +1 more source

Discrimination of roast and ground coffee aroma [PDF]

, 2012
Background: Four analytical approaches were used to evaluate the aroma profile at key stages in roast and ground coffee brew preparation (concentration within the roast and ground coffee and respective coffee brew; concentration in the headspace of the
AM Costa Freitas, AS Franca, C Yeretzian, C Yeretzian, CG Zambonin, E Cantergiani, EA Da Silva, F Mayer, F Ullrich, G Budryn, H Steinhart, I Flament, ID Fisk, ID Fisk, ID Fisk, ID Fisk, J Pawliszyn, M Bröhan, M Korhoňová, N Bhumiratana, N Wang, O Gonzalez-Rios, P Schieberle, P Semmelroch, P Semmelroch, PDC Mancha Agresti, RG Buttery, S Risticevic, W Grosch, W Holscher   +29 more
core   +3 more sources

Hydrochloric acid immobilized on nano‐titanium dioxide: a novel and efficient nanocatalyst for the synthesis of tetrahydrobenzo[b]pyrans [PDF]

شیمی کاربردی روز, 2017
Hydrochloric acid was immobilized onto the surface of amine functionalized nano‐titania. For this purpose, 2,4‐toluene diisocyanate (TDI) as a bi‐functional covalent linker was grafted onto a nano‐titania and next, the unreacted isocyanate groups were ...
Taiebeh Shamsi, Ali Amoozadeh, Elham Tabrizian   +2 more
doaj   +1 more source

Repurposing the KCa3.1 inhibitor senicapoc for Alzheimer's disease. [PDF]

, 2019
ObjectiveMicroglia play a pivotal role in the initiation and progression of Alzheimer's disease (AD). We here tested the therapeutic hypothesis that the Ca2+-activated potassium channel KCa3.1 constitutes a potential target for treating AD by reducing ...
Bushong, Trevor, Chavez, Monique, Jin, Lee-Way, Lucente, Jacopo Di, Maezawa, Izumi, Nguyen, Hai M, Singh, Latika, Singh, Vikrant, Wulff, Heike   +8 more
core   +2 more sources

Oxidation of Aryl Alcohols by Morpholinium Fluorochromate(VI) on Silica Gel, a Selective and Efficient Heterogeneous Reagent

E-Journal of Chemistry, 2011
Morpholinium fluorochromate(VI), MFC, is easily synthesized by reacting morpholine to an aqueous solution of CrO3 and HF. This reagent selectively oxidizes aryl alcohols to their corresponding aldehydes and ketones under mild conditions.
S. Zahra Sayyed-Alangi, H. Sajjadi-Ghotbabadi, Mohammed T. Baei, Sahar Naderi   +3 more
doaj   +1 more source