摘要:

AbstractThe first part of this paper contains an extensive description of the experimental procedures used in estimating the rate constants of the “catalytic” deacylation of aromatic acylamino‐nitro compounds; the accuracy of the methods in question has been argued in detail.In the second part of this paper the results of the kinetic investigation of the deacylation ofortho‐,meta‐ andpara‐nitro‐acetanilide have been given

ISSN:0165-0513    

DOI:10.1002/recl.19480670602

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY

摘要:

AbstractThe synthesis of aromatic bisglycidyl ethers from epichlorohydrin and bivalent phenols under the influence of alkali has been investigated. Hydroquinone bisglycidyl ether has been separated into two diastereoisomers.

ISSN:0165-0513    

DOI:10.1002/recl.19480670603

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY

摘要:

AbstractPhenyl allyl ether was oxidized with perbenzoic acid to form phenyl glycidyl ether. In a similar way the two carbon double bonds in cinnamyl allyl ether added on oxygen, with formation of two epoxy‐groups.Hydroquinone diallyl ether reacted with formation of a mixture containing a small quantity of only one of the two diastereoisomeric hydroquinone bisglycidyl ethers (viz. the higher melting one), but consisting chiefly of 2,3‐ and 2,5‐bisglycidyl‐1,4‐benzoquinone. Apparently, hydroquinone diallyl ether undergoes a Claisen rearrangement during oxidation with perbenzoic acid, resulting in the formation of 2,3‐ and 2,5‐diallyl

ISSN:0165-0513    

DOI:10.1002/recl.19480670604

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY

摘要:

AbstractThe addition of water and of hydrochloric acid to the two diastereoisomeric hydroquinone bisglycidyl ethers was investigated. On hydration, the lowest‐melting isomer (I) yielded one bisglyceryl ether, the highest‐melting one (II) yielded two isomeric bisglyceryl ethers.On addition of hydrochloric acid the two diastereoisomers showed an exactly opposite behaviour.These results may be explained by assuming that the addition to a glycidyl group sometimes corresponds to an S N 2(bimolecular nucleophilic substitution) and sometimes to an S N

ISSN:0165-0513    

DOI:10.1002/recl.19480670605

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY

摘要:

AbstractLes auteurs ont examiné l'influence du groupe sulfonyle sur l'activité de la fonction allylique vis‐à‐vis de la bromosuccinimide. L'introduction de brome ne réussit ni pour les sulfones cycliques de butadiène et d'isoprène, ni pour la sulfone isomère de butadiène. La benzylallylsulfone, la benzylméthallylsulfone et la diallylsulfone ne réagissent pas davantage. Le groupe sulfonyle supprime donc l'activité allylique, même si le, carbone allylique” se trouve à une certaine distance (β ou γ) du groupe sulfonyle, Cette influence à distance est discutée au point de vue de l

ISSN:0165-0513    

DOI:10.1002/recl.19480670606

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY

摘要:

AbstractKetones can be condensed with hydroxymaleic anhydride under the influence of hydrogen chloride to give acids of the typeThe elimination of two molecules of carbon dioxide gives rise to aldehydesIn general the method seems unsuitable, however, for the preparation of large quantities of these aldehydes.

ISSN:0165-0513    

DOI:10.1002/recl.19480670607

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY

摘要:

AbstractThe energy of activation (E), the Arrhenius constant (A) and the period of half‐life at 80° (t1/2) for the radical‐dissociation reactions of the following compounds:pentaphenylethane (I)1,1,1,2‐tetraphenyl‐2‐(2‐methylphenyl)ethane (II)1,1,1,2‐tetraphenyl‐2‐(3‐methylphenyl)ethane (III)1,1,1,2‐tetraphenyl‐2‐(4‐methylphenyl)ethane (IV)1,1,1‐triphenyl‐2,2‐di‐(3‐methylphenyl)ethane (V)1,1,1‐triphenyl‐2,2‐di‐(4‐methylphenyl)ethane ((VI)have been calculated from the velocity constants for the first‐order reactions of the radicals conce

ISSN:0165-0513    

DOI:10.1002/recl.19480670608

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY

摘要:

AbstractThe contradiction noted previously, that the quantity of the cocaines in the leaves on a branch remains almost constant for 8 successive leaves with the exception of that of the youngest leaf, while the composition of the cocaines in the leaves alters during their growth, ‐ young leaves contain more cinnamylcocaines than cocaine and old leaves more cocaine than cinnamylcocaines, ‐ is explained as being caused by the continuous formation of fresh cocaines in the leaves, and the continuous decomposition of an almost equal quantity of cocaines containing less cocaine and more cinnamylcocaines than the percentages in the fresh formed cocaines. Reasons for the quicker decomposition of the cinnamylcocaines in the leaves are indicated.In agreement with this explanation it is noted, that the acids of the esters ofl‐nor‐ecgonine consist for the main part of formic acid, benzoic acid being not present. The way in whichl‐nor‐formylecgonine can be formed in the leaves from the cinnamylcocaines i

ISSN:0165-0513    

DOI:10.1002/recl.19480670609

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY

摘要:

AbstractThe morphine molecule may be considered as derived from 2‐phenylbenzylamine or α‐(2‐diphenyl)‐β‐aminoethane, partially or totally hydrogenated. The synthesis of such compounds and their conversion into N‐substituted alkyl‐ or dialkyl‐aminoalkyl derivatives is described. Hydrogenation of 2‐phenylbenzyl cyanide afforded α‐(2‐diphenyl)‐β‐aminoethane. The synthesis of 2‐aryl‐hexahydrobenzylamines, 2‐cyclohexyl‐benzylamine and 2‐cyclohexylhexahydrobenzylamine is also described. A number of N‐substituted derivatives of these compounds has been prepared.A summary of the pharmacological proper

ISSN:0165-0513    

DOI:10.1002/recl.19480670610

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19480670601

出版商:WILEY‐VCH Verlag    

年代:1948

数据来源: WILEY