摘要:

AbstractIt is postulated that vitamin K plays a part as energy acceptor and hydrogen donor in photosynthesis. Indications are given which may support this hypothesis. A possible function of vitamin K in the process of oxidative phosphorylation is suggested.

ISSN:0165-0513    

DOI:10.1002/recl.19540730702

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractAs was first reported byHodgsonand his collaborators3)4), the nitrosation ofmeta‐chlorophenol gives two products depending on the conditions, the one having a melting point of approx. 142° and the other melting at 184°. The present and the subsequent paper provide experimental evidence showing that of these two “tautomers”, which have been the subject of extensive studies in the past, the low melting compound (m.p. 142°) is an addition complex of equimolecular amounts of the high melting one (3‐chloroquinone‐4‐oxime or 3‐chloro‐4‐nitrosophenol3), m.p. 184°) with 3‐chlorobenzene‐6‐diazo‐oxide (m.p. 124°); the components could be separated and identified by means of chromatography. This conception explains the unorthodox properties of the substance, reported by several authors,e.g.the products of its chemical reactions are derived either from the diazo‐oxide or from the quinone monoxime, the latter reacting according to

ISSN:0165-0513    

DOI:10.1002/recl.19540730703

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractThe nature of the product of m.p. 142°, formed during the nitrosation ofmeta‐chlorophenol in neutral or weakly acidic medium, has been investigated. The view that it should be considered as a complex compound of equimolecular amounts of 3‐chlorobenzoquinone‐4‐oxime (3‐chloro‐4‐nitrosophenol) and 3‐chlorobenzene‐6‐diazo‐oxide is supported by the analytical data, by its formation from the components, by its behaviour during crystallization and by X‐ray data. Moreover, many discrepancies in the literature find an obvious explanation and there are no longer difficulties such as arise in explaining the chemical behaviour of the substance when regarded as a tautomer of the 3‐chloroquinone‐monoxime (m.p. 184°). One of the possible reactions leading to the formation of the diazo‐oxide is the diazotization of the corresponding nitroso‐compound. The presence of 3‐chlorobenzene‐4‐diazo‐oxide amongst the nitrosation products ofmeta‐chlorophenol is demonstrated. The nitrosation ofm‐bromophenol is shown to give products completely analogous to the chloro‐compounds. Finally, the formation of some characteristic complexes, in which diazo‐oxides take part, are discussed. The conclusion is reached that the 3‐halogeno‐4‐nitrosophenols (3‐halogeno‐benzoquinone

ISSN:0165-0513    

DOI:10.1002/recl.19540730704

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

Abstracto,o′‐Dimethoxybenzoyl peroxide (97% purity) has been synthesized in a 50% overall yield from salicylic acid. The compound has been found to be thermally unstable and shock sensi

ISSN:0165-0513    

DOI:10.1002/recl.19540730705

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractL'oxydation des dithiocarbamates par le ferricyanure de potassium, permet d'obtenir aisément les disulfures des tétralkyl‐thiurames avec d'excellents rendeme

ISSN:0165-0513    

DOI:10.1002/recl.19540730706

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractLa bromuration des éthers benzyliques des dihydroxyphényl alcoylcétones, par la bromo‐succinimide, se fait avec de très bons rendements et sans coupure partielle des groupes ben

ISSN:0165-0513    

DOI:10.1002/recl.19540730707

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractLe bis‐tertiobutylsulfonyl‐acétylène présente une remarquable tendance à l'addition de réactifs nucléophiles. Les alcools se fixent sans catalyseur et les mercaptannes sont encore plus actifs. Pour les phénols la présence d'un phénolate es

ISSN:0165-0513    

DOI:10.1002/recl.19540730708

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractA description is given of the preparation of substituted methylsulphonylacetonitriles CH3SO2CHXCN, X being CH3SO2, CO2C2H5, C6H5SO2, CH3SO or CN.

ISSN:0165-0513    

DOI:10.1002/recl.19540730709

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractWhen reacting diazomethane on nitriles of the type RSO2‐CHXCN, where X is a negative group, methylation on the nitrogen atom often occurs. In the case of bis‐methylsulphonyl‐acetonitrile, the N‐methyl derivative is formed exclusively: (CH3SO2)2CCNCH3. The less acidic methylsulphoxyl‐methylsulphonyl‐acetonitrile forms only the C‐methyl derivative: (CH3SO

ISSN:0165-0513    

DOI:10.1002/recl.19540730710

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractThe alkaline decomposition of p‐tolylsulphonylmethylnitrosamide with potassium hydroxide in ethyl alcohol yields chiefly diazomethane, together withethyland potassium p‐toluenesulphonate. These products are compatible with a pseudo‐catalytic mechanism in which the ethylate ion plays a main

ISSN:0165-0513    

DOI:10.1002/recl.19540730711

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY