Synthesis and some transformations of polybrominated quinone diazides
作者:V. A. Vasin、M. V. Fadin、I. V. Tarasova
DOI:10.1134/s1070428017120053
日期:2017.12
The reduction of polybrominated o- and p-nitrophenols with granular tin in concentrated aqueous HCl gave polybrominated aminophenols which were diazotized with sodium nitrite in concentrated sulfuric acid at 0°C to obtain polybrominated o- and p-quinone diazides. Their thermolysis with elimination of nitrogen generated ketocarbenes which reacted with acetylacetone to form insertion products at the
Products of reaction between tetrabromo-substituted ortho- and para-hydroxybenzoic acids and sodium nitrite in CH3COOH
作者:M. V. Fadin、I. V. Tarasova、V. A. Vasin、V. N. Shishkin
DOI:10.1134/s1070428012080064
日期:2012.8
The reaction of 2,3,5,6-tetrabromo-4-hydroxybenzoic acid with a 10-fold excess of NaNO2 in the glacial acetic acid at 20A degrees C affords tetrabromonitrosophenols whose further transformations under the reaction conditions leads to the formation of a mixture of 2,4,5,6-tetrabromo-p-quinone diazide and tetrabromo-p- and -o-nitrophenols in the molar ratio 37: 2: 1. Under similar conditions the 3,4,5,6-tetrabromo-2-hydroxybenzoic acid is converted into a mixture of 3,4,5,6-tetrabromo-o-quinone diazide with the same nitrophenols in the ratio 13: 1: 3. The reaction of sodium 2,3,5,6-tetrabromo-4-hydroxy-benzoate with NaNO2 in dilute acetic acid resulted in a quantitative yield of tetrabromo-p-quinone monooxime.
US4265664A
申请人:——
公开号:US4265664A
公开(公告)日:1981-05-05
Renneberg, Bernd; Kellner, Michael; Laatsch, Hartmut, Liebigs Annalen der Chemie, 1993, # 8, p. 847 - 852