نتایج جستجو برای: a3 coupling reaction

تعداد نتایج: 563419  

طائب, عباس, منطقی, فرانک,

A new complex of cadmium was synthesized by the reaction of cadmium nitrate, potm;sium dichromate, and ethylenediamine. Its crystal structure was dete rmined by X-ray diffractomctry. It is Crystalli:tt.:d in a monoclinic system, with P21 /n(1 4) poinl group and 4 molecules of the complex in the unit ceiL The cryst,d parameters arc: a = 7.4615(7)A. h= 7.1480(2)A. c= 14.~4B5( 10)A /3= 92.(...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1392

abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...

Journal: :IEEE Transactions on Microwave Theory and Techniques 2021

This work presents a class of micro-electromechanical system (MEMS)-driven radio frequency filters in the X-band. The X-band center frequencies are achieved by resorting to third-order antisymmetric Lamb wave mode (A3) 650-nm-thick Z-cut lithium niobate thin film. A novel bandwidth (BW) widening technique based on using self-inductance top interdigital transducers and bus lines is proposed over...

Journal: :Biochimica et biophysica acta 1984
W R Hagen W R Dunham R H Sands R W Shaw H Beinert

O2-activated bovine heart cytochrome c oxidase has been examined by dual-mode EPR spectrometry. Resonances have been observed at g = 10 and 4.5 in the parallel mode and at g = 10, 5, 1.8 and 1.7 in the normal mode. The bulk of these signals are interpreted to come from a stoichiometric S = 2 system with magnitude of a = 0.17 cm-1, D = +2.1 cm-1, magnitude of E = 0.026 cm-1, g = 2. Exchange coup...

Kaolin-SO3H nanoparticles were prepared via reaction of kaolin and chlorosulfonic acid and characterized by FT-IR, XRD, FESEM, TEM, XRF, EDS, BET and TGA. The activity of this green catalyst was probed by the synthesis of aryl diazonium salts as the starting reactant and then, their diazo coupling with  2-naphthol to form azo dyes in a solvent-free medium at room temperature...

Journal: :The Journal of organic chemistry 2005
Jose Luis Chiara Angela García Gabriella Cristóbal-Lumbroso

[reaction: see text] The intramolecular 1,6-ketone/imide reductive coupling promoted by samarium diiodide competes favorably with an alternative 1,5-ketone/oxime ether coupling in a keto-oxime substrate derived from D-glucosamine N-protected with a phthalimido group. This pinacol coupling reaction affords new homochiral alpha-hydroxylactam scaffolds that could be useful in diversity-oriented sy...

Journal: :iranian journal of catalysis 0
raheleh pourkaveh laboratory of organic synthesis and natural products, department of chemistry, sharif university of technology, azadi street, po box 111559516 tehran, iran. hirbod karimi young researchers and elite club, shahreza branch, islamic azad university, shahreza, iran.

the cross-coupling reaction between phenylboronic acid and various types of aryl halides (suzuki reaction) was carried out using a catalytic amount of a new palladium catalyst (1-benzyl-3-(1-benzyl-1-methylpyrrolidin-1-ium-2-yl) pyridin-1-ium palladium chloride [dbnt][pdcl4]) in poly (ethylene glycol) (peg-200) in the presence of koh as the base. this new catalyst was synthesized and characteri...

Journal: :American journal of physiology. Renal physiology 2015
Yan Lu Rui Zhang Ying Ge Mattias Carlstrom Shaohui Wang Yiling Fu Liang Cheng Jin Wei Richard J Roman Lei Wang Xichun Gao Ruisheng Liu

Adenosine plays an important role in regulation of renal microcirculation. All receptors of adenosine, A1, A2A, A2B, and A3, have been found in the kidney. However, little is known about the location and function of the A3 receptor in the kidney. The present study determined the expression and role of A3 receptors in mediating the afferent arteriole (Af-Art) response and studied the interaction...

Journal: :iranian journal of catalysis 2011
abdolhamid bamoniri bi bi fatemeh mirjalili arash ghorbani-choghamarani mohammad e. yazdanshenas abbas shayanfar

a convenient, rapid, and one-pot method for the synthesis of azo dyes has been developed. in this protocol, diazotization reagent (arn2+ -cro3–sio2) was prepared via grinding of aromatic amines, nano2, wet sio2 and nano silica chromic acid (nano-sca) without solvent at room temperature. the obtained diazotization reagent was sufficiently stable to be kept at room temperature in the dry state fo...

Journal: :iranian chemical communication 0
shivaji sandu pandit post graduate and research centre, department of chemistry, padmashri vikhe patil college of arts, science and commerce pravaranagar, (loni kd) tal. rahata. dist. ahmednagar 413713 (ms) india. sonali shivaji pardhe post graduate and research centre, department of chemistry, padmashri vikhe patil college pravaranagar 413713. tal rahata dist. ahmednagar (ms) india yashwant bhaskar pandit bapplied chemistry division, diat-drdo, girinagar, pune. 411025.(ms) india

a highly efficient protocol has been developed for the synthesis of 2-hydrazolyl-4-thiazolidinone derivatives installing a one pot three component coupling reaction of an aromatic aldehyde, thiosemicarbazide and maleic anhydride using guanidine hydrochloride as highly inexpensive and environmentally friendly catalyst under solvent free condition at 1200c with good to excellent yields, it offers...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید