نتایج جستجو برای: potassium phosphite

تعداد نتایج: 78234  

2011
Amira S. Abd El-All Asmaa A. Magd-El-Din Souad. A. Osman Hisham A. Yosef Taghrid S. Hafez

The reaction of 3-mercapto-6-methyl-1, 2, 4-triazin-5 (2H)-one 1 with dimethyl 2a and trimethyl phosphite 3a at 100 C in absence of solvent yields the dimeric product 4 and while the alkylated products 5 and 6 are obtained for reaction with 3a. Methylation of 1 by methyl iodide gives alkylated product 5. Reaction of 1 with diethyl 2b and triethyl phosphite 3b by the same previous conditions yie...

Journal: :Journal of the American Chemical Society 2005
Tina L Amyes John P Richard James J Tait

We report that the binding of phosphite dianion to orotidine 5'-monophosphate decarboxylase (OMPDC) results in an 80 000-fold increase in kcat/Km for decarboxylation of the truncated substrate, 1-(beta-d-erythrofuranosyl)orotic acid (EO), which lacks a 5'-phosphodianion moiety. The intrinsic binding energy (IBE) of phosphite dianion in the transition state is 7.8 kcal/mol, which represents a ve...

Journal: :Chemical science 2016
Abhijnan Ray Choudhury Santanu Mukherjee

An enantioselective dearomatization of isoquinolines has been developed using chiral anion-binding catalysis. This transformation, catalyzed by a simple and easy to prepare tert-leucine-based thiourea derivative, makes use of silyl phosphite as a nucleophile and generates cyclic α-aminophosphonates. This is the first time asymmetric anion-binding catalysis has been applied to the synthesis of α...

Journal: :Chemical communications 2010
Xavier Bantreil Thibault E Schmid Rebecca A M Randall Alexandra M Z Slawin Catherine S J Cazin

The synthesis, characterisation and catalytic behaviour of ruthenium indenylidene complexes bearing an N-heterocyclic carbene and triisopropylphosphite are described.

Journal: :Organic & biomolecular chemistry 2012
Hua Cui Ying Li Songlin Zhang

Carbonyl compounds react with organozinc reagents in the presence of diphenyl phosphite to give the corresponding olefins. A variety of 1,3-dienes and unsaturated esters were obtained in moderate to excellent yields under mild conditions.

2013
J. Fur

Crystals of glycine phosphite G l y H 3 P 0 3 (abbreviated as GPI ) belong to the low-symmetry representatives of hydrogen-bonded crystals. At room temperature the unit cell of this compound is monoclinic (space group P21 /a) and contains four formula units [1]. The crystal structure is characterised by the presence of infinite chains of hydrogen-bonded phosphite anions that are directed along ...

2010
Omar bin Shawkataly Imthyaz Ahmed Khan Chin Sing Yeap Hoong-Kun Fun

The asymmetric unit of the title triangulo-triruthenium compound, [Ru(3)(C(25)H(22)As(2))(C(18)H(15)O(3)P)(CO)(9)], contains two crystallographically independent but similar mol-ecules. The bis-(diphenyl-arsino)methane ligand bridges an Ru-Ru bond and the monodentate phosphite ligand bonds to the third Ru atom. Both the phosphite and arsine ligands are equatorial with respect to the Ru(3) trian...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 1996
farajollah mohanazadeh yousef ranjbar

deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.

Journal: :Chemical communications 2006
Xike Gao Weiping Wu Yunqi Liu Wenfeng Qiu Xiaobo Sun Gui Yu Daoben Zhua

Three new linear benzene-fused bis(tetrathiafulvalene) compounds (1-3) were easily synthesized by one-step phosphite-induced cross-coupling reactions; a solution processed organic field-effect transistor based on 2 shows high mobility of 0.02 cm2/Vs.

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