ISSN:0570-0833    

DOI:10.1002/anie.196200651

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

摘要:

AbstractBis [1,3‐diphenyl‐2‐imidazolidinylidene]‐ shows a considerable tendency towards dissociation into two carbenes. Reactions with this easily accessible carbene source lead to an understanding of nucleophilic carbene chemistry. The question of the existence of particularly stable carbenes is discussed, and it is suggested that a surprisingly large area of preparative possibilities and theoretical knowledge awaits deve

ISSN:0570-0833    

DOI:10.1002/anie.196200751

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

摘要:

AbstractThe oxidation of olefins to carbonyl compounds with palladium compounds, especially the oxidation of ethylene to acetaldehyde, is at present carried out on a technical scale. The reaction takes place via a palladium‐olefin complex, the formation of which is inhibited by halide ions. Hydrolysis to the carbonyl compound is inhibited by hydrogen ions. The knowledge gained by studying the reaction of olefins with pure solutions of palladium salts allows important conclusions to be drawn concerning the action of technical catalyst solutions containing copper and palladium chlorid

ISSN:0570-0833    

DOI:10.1002/anie.196200801

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

摘要:

AbstractThe nitrogen‐sulpher linkage in compounds of the type RNSO is capable of undergoing addition. For N‐sulfinylsulfonamides in particular, the reactivity is increased so greatly that new type of compounds may be obtained by cyclic addition or migration of the sulfinyl

ISSN:0570-0833    

DOI:10.1002/anie.196200891

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

摘要:

AbstractMass spectrometry is a very useful method for the determination of the structure of organic compounds although the technique has not yet been widely employed in this field. Of particular interest is the high sensitivity of the instrument, making possible the use of very small amounts of sample, and the information obtainable regarding the size of the molecule and position of the groups therein. A certain volatility is required and the choice of a suitable derivative is, therefore, sometimes of importance. The fragmentations of the molecules in the ion source may be considered as reactions of “carbonium ions without solvent.” The application of the method in the determination of the structure of some natural products is outlined, using lipids, amino acids, peptides and alkaloids as examp

ISSN:0570-0833    

DOI:10.1002/anie.196200981

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196201111

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196201123

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196201133

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196201142

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196201153

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY