Non-aqueous cerimetric determination of phenylhydrazides

A non-aqueous oxidimetric method is described for the determination of some carboxylic acid phenylhydrazides with ammonium hexanitratocerate(IV) in acetonitrile. The end-points have been detected visually with chemical indicators (diphenylamine, diphenylbenzidine, Methyl Red, Malachite Green, Janus Green, Gentian Violet) and potentiometrically. The compounds are smoothly, rapidly and quantitatively oxidized with a two-electron change per hydrazino group. The method is simple, accurate, reliable and widely applicable.     

Reaction of acridinium salts with phenylhydrazones and phenylhydrazides

4-(9-Acridinyl)phenylhydrazones and phenylhydrazides were obtained by condensation of the phenylhydrazones of aromatic aldehydes and ketones and the phenyl-hydrazides of carboxylic acids with acridinium salts in the presence of an oxidizing agent.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 387–391, March, 1975.     

Substituted hydrazides of hydroxycarboxylic acids XXVIII. Morpholinoacetyl derivatives of phenylhydrazides of diaryl and dialkyl glycolic acids

The action of morpholine on chloroacetyl derivatives of phenylhydrazides of diaryl- and dialkylglycolic acids gives hitherto undescribed morpholinoacetyl derivatives of the phenylhydrazides. Methiodides of a number of these compounds are prepared. The hitherto undescribed chloroacetyl derivatives of the phenylhydrazides of di(m-tolyl)-, di(o-anisyl)-, diamyl-, diheptyl-, and dioctylglycolic acids, and also the phenylhydrazide of diheptylglycolic acid are described.For Part XXVII see [1].     

Substituted hydrazides of hydroxycarboxylic acids XXVIII. Morpholinoacetyl derivatives of phenylhydrazides of diaryl and dialkyl glycolic acids

The action of morpholine on chloroacetyl derivatives of phenylhydrazides of diaryl- and dialkylglycolic acids gives hitherto undescribed morpholinoacetyl derivatives of the phenylhydrazides. Methiodides of a number of these compounds are prepared. The hitherto undescribed chloroacetyl derivatives of the phenylhydrazides of di(m-tolyl)-, di(o-anisyl)-, diamyl-, diheptyl-, and dioctylglycolic acids, and also the phenylhydrazide of diheptylglycolic acid are described.     

Reaction of phenylhydrazides of N-acyl-β-phenyl-β-alanine with phosphorus oxychloride

The reaction of N-methyl-N-phenylhydrazides of N-acyl--phenyl--alanine with phosphorus oxychloride is accompanied by cleavage of the C-N bond in the intermediately formed 2-aminoindole derivative and, after splitting out of an amide fragment, leads to 1-methyl-3-benzylidene-2-iminoindoline and nitriles. Pyrimido [4,5-b] indoles — products of cyclization of the corresponding intermediate 2-aminoindole derivatives — were isolated from the reaction mixtures in low yields. The structure of 1-methyl-3-benzylidene-2-iminoindoline was proved by alternative synthesis.Deceased.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1356–1359, October, 1980.     

The mass spectra of some simple phenylhydrazides and a re-examination of the fragmentations of phenylhydrazine

The elimination of small neutral fragments from acetyl-, formyl- and ethoxycarbonyl- phenylhydrazines with formation of [C6H8N2]⁺? ions has been studied. Evidence is obtained from deuterium labelling and from metastable peak intensity ratios, to show that ketene loss from both acetylphenylhydrazines is accompanied (or preceded) by hydrogen transfer to the acylated nitrogen atom to give ions structurally analogous to the phenylhydrazine molecular ion. The decomposing [C6H8N2]⁺? ions formed from formyl- and ethoxycarbonylphenylhydrazines are also suggested to have a phenylhydrazine-like structure. In the molecular ion of phenylhydrazine interchange occurs between the two ortho hydrogen atoms and two of the three hydrazine hydrogens prior to decomposition; labelling data suggest that the N-1 hydrogen does not participate in the interchange process.     

Herrn Professor Dr. Dr. h. c. mult. J. F. K. Huber

Ohne Zusammenfassung     

Ein Teleskop-Brenner. D.R.G.M.

Ohne Zusammenfassung     

Gaspolarographie. II. Mitt.

Zusammenfassung Stickstoffdioxid, Stickstoffmonoxid, Distickstofftrioxid und Distickstoffmonoxid sind in wasserfreiem Dimethylsulfoxid polarographisch erfaßbar.

---

Summary Nitrogen dioxide, nitrogen, monoxide, nitrogen trioxide, and nitrous oxide can be detected polarographically in anhydrous dimethylsulfoxide.

---

Résumé On peut déceler le peroxyde d'azote, l'oxyde azotique, l'anhydride azoteux et l'oxyde azoteux par polarographie dans le diméthylsulfoxyde anhydre.

---

---

Herrn Prof. Dr.A. A. Benedetti-Pichler zum 70. Geburtstag gewidmet.

---

Für die Unterstiitzung der Untersuehungen wird der Regierung der USA gedankt.