Aryl alkanehydrazonates and their thio analogs. Synthesis of some 2-alkyl derivatives of 4H-1,3,4-benzoxadiazines and 4H-1,3,4-benzothiadiazines.
スポンサーリンク
概要
- 論文の詳細を見る
Synthesis of some <I>p</I>-nitrophenyl alkanethiohydr azonates, RC(SC<SUB>6</SUB>H<SUB>4</SUB>NO<SUB>2</SUB>-<I>p</I>)=NNHC<SUB>6</SUB>H<SUB>3</SUB>BrNO<SUB>2</SUB>(2, 4<SUP>−</SUP>), and <I>p</I>-nitrophenyl alkanehydrazonates, RC(OC<SUB>6</SUB>H<SUB>4</SUB>NO<SUB>2</SUB><I>p</I>=NNHC<SUB>6</SUB>H<SUB>3</SUB>BrNO<SUB>2</SUB>(2,4<SUP>−</SUP>) is described. Upon treatment with triethylamine in ethanol at reflux the thiohydrazonates give directly 2-alkyl-4-(<I>p</I>-nitrophenyl)-7-nitro-4<I>H</I>-1,3,4-benzothiadiazines, whereas the hydrazonates yield the hydrazides, RCONHN(C<SUB>6</SUB>H<SUB>4</SUB>NO<SUB>2</SUB>-<I>p</I>)C<SUB>6</SUB>H<SUB>3</SUB>BrNO<SUB>2</SUB>(2,4<SUP>−</SUP>). The latter hydrazides can be cyclized, under stronger basic conditions, into 2-alkyl-4-(<I>p</I>-nitrophenyl)-7-nitro-4<I>H</I>-1,3,4-benzoxadiazines by displacement of the 2-bromine atom.
- 公益社団法人 日本化学会の論文
著者
-
Shawali Ahmad
Department of Chemistry, Faculty of Science, University of Cairo
-
Shawali Ahmad
Department of Chemistry, Faculty of Science, University of Kuwait
-
Hassaneen Hamdi
Department of Chemistry, Faculty of Science, University of Cairo
関連論文
- Spectra and Keto-Enol Equilibrium of Benzoylacetanilides
- Synthesis and Reactions of α-Bromoaroylacetarylamides
- Copper(II) chelates with some photographic color intermediates. Structure-stability relationships.
- Aryl alkanehydrazonates and their thio analogs. Synthesis of some 2-alkyl derivatives of 4H-1,3,4-benzoxadiazines and 4H-1,3,4-benzothiadiazines.
- Preparation of aryl hydrazonates and 1,2-diacylhydrazines by phase transfer catalysis.
- Kinetics and mechanism of thermal isomerisation of aryl alkanehydrazonates into N',N'-diarylhydrazides. Extension of a recent free radical analogue of the chapman rearrangement.