An infrared spectroscopic method of distinguishing isomeric disubstituted hydrazines as salts
作者:J. A. Blair、R. J. Gardner
DOI:10.1039/j39700002707
日期:——
Isomeric 1,1- and 1,2-disubstituted hydrazines may be readily distinguished by examination of the NH stretching frequencies in the i.r. spectra of their hydrochloride salts.
通过检查它们的盐酸盐的IR光谱中的NH拉伸频率,可以容易地区分异构的1,1-和1,2-二取代的肼。
Synthesis of multi-substituted 1,2,4-triazoles utilising the ambiphilic reactivity of hydrazones
The synthesis of N-alkyl-1H-1,2,4-triazoles from N,N-dialkylhydrazones and nitriles via formal [3+2] cycloaddition including the C-chlorination/nucleophilic addition/cyclisation/dealkylation sequence was developed. This sequential reaction utilising the in situ generation of hydrazonoyl chloride based on the ambiphilic reactivity of hydrazones afforded a variety of multi-substituted N-alkyl-triazoles
Synthesis of <i>o</i>-(Dimethylamino)aryl Ketones, Acridones, Acridinium Salts, and 1<i>H</i>-Indazoles by the Reaction of Hydrazones and Arynes
作者:Anton V. Dubrovskiy、Richard C. Larock
DOI:10.1021/jo302378w
日期:2012.12.21
A novel, efficient route to biologically and pharmaceutically important o-(dimethylamino)aryl ketones, acridones, acridinium salts, and 1H-indazoles has been developed starting from readily available hydrazones of aldehydes and o-(trimethylsilyl)aryl triflates. The reaction proceeds through arynes under mild conditions, tolerates a wide range of functional groups, and provides the final products in
[EN] HALOGEN SUBSTITUTED DIKETONES, PYRAZOLE COMPOUNDS AND PROCESSES FOR THE MANUFACTURE OF PYRAZOLE COMPOUNDS<br/>[FR] DICÉTONES SUBSTITUÉES PAR UN HALOGÈNE, COMPOSÉS DE PYRAZOLE ET LEURS PROCÉDÉS DE PRODUCTION
申请人:SOLVAY
公开号:WO2017129759A1
公开(公告)日:2017-08-03
The present invention concerns new halogen substituted diketone compounds, new pyrazole compounds, processes for the manufacture of pyrazole compounds and processes for the manufacture of agrochemical or pharmaceutical compounds.
A synthetic approach to 1,3,4-thiadiazolidine-2-thiones
作者:F.C. Heugebaert、J.F. Willems
DOI:10.1016/0040-4020(66)80065-0
日期:1966.1
The course of the reactionbetween dithiocarbazic acid and aldehydes and ketones has been examined. Aliphatic and π-deficient heterocyclic aldehydes and ketones form 1,3,4-thiadiazolidine-2-thiones. Aromatic and π-excessive heterocyclic aldehydes and ketones, however, form azines. A similar course occurs in the reactionbetween the hydrazones and carbondisulphide.