摘要:

AbstractThe synthesis of 2‐carboxy‐4‐hydroxy‐3‐quinoline‐alkylcarboxylic acids is described, these acids being prepared by the condensation of the triethyl esters of α‐oxalyldicarboxylic acids with aniline. By heating the anils thus obtained, esters are formed which, upon saponification, yield

ISSN:0165-0513    

DOI:10.1002/recl.19530721002

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractPoursuivant leurs recherches sur les composes sulfones vinylogues, les auteurs ont fait réagir le 1,2‐dichloro‐1‐tertiobutylsulfonyl‐éthène (I) avec l'ammoniac, plusieurs amines primaires et secondaires; quelques composés à méthylène actif et avec des magnésiens.Enfin on a soumis le sulfochlorure vinylogue (I) à une réduction, qui conduit à

ISSN:0165-0513    

DOI:10.1002/recl.19530721003

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractDie für Gaswerke so wichtige gleichzeitige Auswaschung von Ammoniak und Kohlendioxyd wird als ein Diffusionsprozess in Verbindung mit einer chemischen Reaktion behandelt.Die aufgestellten Differentialgleichungen werden unter Vernachlässigung von Gliedern weniger Bedeutung integriert und, es wird gezeigt, wie das Resultat für einen Satz gegebener Werte mit einer numerischen Integration in guter Übereinstimmung ist.Die Absorption von Kohlendioxyd in Ammoniakwasser wird nach derselben Methode behandelt und die Resultate stimmen hier mitvan Krevelen5) überein.In einem mit 5 mm Raschigringen gefüllten Glasturm werden Absorptions‐versuche mit Gas mit wechselndem Ammoniak‐ und Kohlendioxydgehalt ausgeführt, und die Resultate sind mit den entwickelten Formeln in guter Über

ISSN:0165-0513    

DOI:10.1002/recl.19530721004

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractWhen 3‐bromo‐2,4‐dihydroxypyridine is heated with an aqueous solution of nitric acid, 5‐bromo‐2,4‐dihydroxy‐3‐nitropyridine is formed. This reaction product was also obtained by nitrating 5‐bromo‐2,4‐dihydroxypyridine and by brominating 2,4‐dihydroxy‐3‐nitropyridine; its structure was established by converting it into the known 5‐bromo‐2,3,4‐trichloropyridine.The mechanism of the nitration of 3‐bromo‐2,4‐dihydroxypyridine is discussed in c

ISSN:0165-0513    

DOI:10.1002/recl.19530721005

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe steady states of ionic motions and the steady distributions of concentrations are developed for mixed electrolytes when only one kind of ions is reducible at the cathode. The resulting potential difference in solution is derived. The analysis is given for the limiting case that maximum current is reached.

ISSN:0165-0513    

DOI:10.1002/recl.19530721006

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe condensation of formaldehyde (paraformaldehyde or trioxane) with trichloroethene in the presence of aluminium chloride gives a mixture of 2,3,3,3‐tetrachloropropanol‐1, the di‐ether of this alcohol (2,3,3,3,2′,3′,3′,3′‐octochloro‐di‐n‐propylether), and αβ‐dichloropropionyl chloride.The same di‐ether is obtained by the condensation of symm.‐dichlorodimethyl ether with trichloroethene.Condensation of chloromethyl methyl ether with trichloroethene gives the methyl ether of 2,3,3,3‐tetrachloropropanol‐1.Tetrachloroethene yields, by condensation with formaldehyde, 2,2,3,3,3‐pentachloropropanol‐1 and the di‐ether of this alcohol (2,2,3,3,3,2′,2′,3′,3′,3′‐decachloro‐di‐n‐propylether).The same ether results from the condensation of tetrachloroethene with symm.‐dichlorodimethyl ether.At temperatures above 50°, cleavage and dehydrohalogenation of the di‐ether of 2,2,3,3,3‐pentachloropropanol‐1 occurs, with formation of 1,1,2,3,3‐pentachloropropene‐1 as well as 2,2,3,3,3‐pentachloropropanol‐1.Condensation of chloromethyl methyl ether with tetrachloroethene is accompanied by cleavage of the ensuing methyl ether of 2,2,3,3,3‐pentachloropropanol‐1, and yields

ISSN:0165-0513    

DOI:10.1002/recl.19530721007

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19530721008

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe specific rotation of lactose has been estimated for wave‐lengths 5461 and 5893. The influences of concentration, temperature and pH of the solution have been studied and expressed in new formula

ISSN:0165-0513    

DOI:10.1002/recl.19530721009

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractAn improved procedure for the determination of organic acids in plant products by paper chromatography is described.

ISSN:0165-0513    

DOI:10.1002/recl.19530721010

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractSome α‐glyceryl ethers present in cod‐liver oil have been converted into the corresponding aldehydes by oxidation with periodic acid. These aldehydes have been separated by paper chromatogr

ISSN:0165-0513    

DOI:10.1002/recl.19530721011

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY