1,373 research outputs found

    Historical Heritage Factor in Evaluating Development Prospects of the Regional Multicultural Community

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    AbstractThe investigation proposes a number of approaches to assessment of the factors of historical heritage in terms of their impact on quality of living and socio-economic development of a multicultural region. The monitoring variant and the complex of methods were substantiated to give predictive assessment of the prospects of socio-economic development of a region in the analysis of historical retrospective of its development. They are based on the analysis of the category of quality of life and represent the combination of logical modeling methods (including the construction of forecast scenarios), mathematical-statistical and expert judgments.In particular, the authors propose a modified index statistical method of monitoring and forecasting of the dynamics of the quality of life of a region, taking into account a social differentiation of its territory. The authors have elaborated the quality of life (dynamics) change indicators, considering a historical retrospective. These indicators form the basis for the identification and analysis of regional development scenario variants. The paper also presents an adaptable method of expert judgments based on a questionnaire for social and economic forecasting.The Republic of Tatarstan, being one of the most dynamic multicultural regions of Russia with rich historical and cultural heritage was selected as a base region. The paper presents a number of forecast scenarios of development of the region, based on the differentiation of the quality of life of regional community, and takes into account local areas of compact settlement of various ethnic groups.The comparative evaluation of these scenarios is provided

    The reactivity of 1, 3, 2-diheterophospholans containing a tricoordinate phosphorus atom

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    The results of studies on the reactivity of 1, 3, 2-di-heterophosphacycloalkanes containing a tricoordinate phosphorus atom carried out in recent years are examined and surveyed. Much attention has been devoted to reactions leading to an increase of the coordination number of the ring phosphorus atom and also to exocyclic and endocyclic substitution reactions. The mechanisms and certain stereochemical characteristics of the reactions of cyclic phosphorus compounds are discussed. In a few instances the reactivities have been estimated quantitatively. © 1983 The British Library

    Phosphorylated derivatives of salicylaldehyde azomethines

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    © 2016 Taylor & Francis Group, LLC.New phosphorylated azomethines on the basis of salicylaldehyde were obtained. These compounds react with P(Y) chlorides to form diphosphorylated azomethines

    Reactions of Pyridoxal with Heterocycles Containing Primary Amino Group

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    © 2018, Pleiades Publishing, Ltd. New nitrogen-containing derivatives of pyridoxal were obtained as a result of its reaction with various amines. The reactions with amines bearing a heterocyclic fragment (pyridine, pyrimidine, quinoline, piperidine) furnished the final products stabilized in an aminoacetal form. The product prepared from 2-aminomethylpiperidine has an imidazolidine fragment in the molecule

    Polarity of P-N bond

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    The polarity of the P-N bond in the amides of phosphorus acids depends on the valence state of the phosphorus atom and the nature of the substituents attached to both atoms. © 1977 Plenum Publishing CorporationPlenum Publishing Corporation

    Reactions of pyridoxal with aromatic carboxylic acids in alcoholic medium

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    © 2017, Pleiades Publishing, Ltd. Reactions of pyridoxal with benzoic acid and its derivatives in alcoholic medium afforded alkoxyfuropyridinium salts with potential biological activity

    New method for the synthesis of phosphonic and phosphinic esters and their thio analogs Communication 13. Addition of O,O-diethyl hydrogen phosphorothidite to ketones and aldehydes

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    1. It has been shown that O,O-diethyl hydrogen phosphorothioitein presence of sodium ethoxide reacts readily at the double bond of unsaturated ketones with formation of keto phosphonothionic esters. It adds to saturated ketones at, the carbonyl group with formation of α -hydroxy phosphonothionic esters. 2. O,O-Diethyl hydrogen phosphorothiotte -adds at the carbonyl group of unsaturated and saturated aldehydes with formation, respectively, of unsaturated and saturated α-hydroxy phosphonothionic esters. 3. A method .has been developed for the synthesis of keto phosphonothionic esters and of unsaturated and saturated α-hydroxy phosphonothionic esters. © 1953 Consultants Bureau

    Organophosphorus compounds with an active methylene group

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    The review deals with the present state of the chemistry of organophosphorus compounds with an active methylene group: esters and nitriles of phosphonoacetic acids, phosphonoacetone, and other compounds in which the methylene group is linked directly to the P=O and any other electronegative group. Compounds of this type are analogues of acetoacetic, malonic, cyanoacetic, and phenylacetic esters, the importance of which for theoretical and synthetic organic chemistry is well known. The methods for the synthesis of phosphorus-containing compounds with an active methylene group are considered in the first part of the review, while their chemical properties associated with the mobility of the hydrogen atoms of the methylene group (alkylation, addition, condensation, P(O)-activated olefin formation, and certain other reactions) are dealt with in the second part. © IOP Publishing Ltd
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