摘要:

AbstractThis review covers homogeneously catalyzed reactions of nonactivated olefines with aliphatic amines, α‐C  H bonds of amines react with olefines under addition to the C = C double bond in the presence of radical initiators and metal amides of early transition elements, respectively. According to Reppe the aminomethylation of olefines with CO/H2O and amines can be catalyzed by selected complexes of the VIII B groups elements. The N — H addition to olefinic double bonds is catalyzed by alkali metal compounds as well as by particular rhodium and iridium compounds. These amination reactions proceed by different mechanisms, probably with a β‐aminoethyl metal species being the most important intermediate. The chemistry of such β‐nitrogen substituted alkyl metal compounds is discussed with special attention being paid to the pronounced structure dependence of their stability an

ISSN:0044-2402    

DOI:10.1002/zfch.19860261002

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY

摘要:

AbstractThe products of the reaction of several alkyl, aryl, sterically hindered aryl and cyclic phosphites, thiophosphites, benzenephosphonites and triphenylphosphine with tert‐butoxyl radicals generated by thermolysis of di‐tert‐butyl peroxalate (DTBPO) in chlorobenzene at 50°C was studied.Alkyl phosphites are oxidized to the corresponding phosphates by β‐scission of the intermediate phosphoranyl radicals. Phenyl phosphites react under displacement of a phenoxyl to give tert‐butyl phosphites by α‐scission of the intermediate phosphoranyl radicals. Sterically hindered p‐methyl‐phenyl phosphites also form the tert‐butyl phosphites accompanied by rearranged p‐hydroxyphenylmethanephosphonates. Cyclic arylene phosphites are predominantly oxidized, substitution takes place to a minor extent.Benzenephosphonites and phosphines react with tert‐butoxyl radicals by oxidation to give the corresponding phosphonates and phosphine oxide, resp.Those phosphorus compounds which are oxidized with the formation of tert‐butyl radicals accelerate the thermal decomposition of DT BPO u

ISSN:0044-2402    

DOI:10.1002/zfch.19860261003

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY

摘要:

AbstractThe present paper gives a survey of the prepartion of specific tritium labelled steroids of high and highest activity (up to 58 Ci/mM and 2150 GBq/mM, resp.) using the method of catalytic tritiation. It concerns steroids of all classes — androstanes, estratrienes, norandrostanes and progesterones ‐0‐‐ labelled in different positions of all the four possible rings of the steroid skeleton. The tritium labelled products have been applied in many research laboratories of the GDR and also been exported

ISSN:0044-2402    

DOI:10.1002/zfch.19860261004

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19860261005

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19860261008

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19860261009

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19860261010

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19860261012

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19860261013

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19860261015

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1986

数据来源: WILEY