SU1634687A1 - Process for preparing 7-hydroxynaphto[2,3- ]phenoselenazine-8,13-dione - Google Patents

Abstract

The invention relates to organic chemistry, in particular, to methods for producing 7-hydroxynaphlor derivatives, 3 tons of phenoselrnaene-8,1 3-diones - dyes for optical recording devices. The invention does not require the use of hard-to-reach 2-amino selenophenols, to reduce processing time from 6 h to 15-30 min., simplify the process of isolating the target product by using 1-azido-2-phenyl seleno-4-hydroxyanthraquinone, which is boiled in o-xylene or o-dichlorobenzene, or dimethyl forms.

Description

The solution is cooled and the precipitated target product is filtered off. After washing on the filter with ether, an analytically pure is obtained.

7 hydroxinaftoЈ2,3-a phenoselenazin-8,13-diode with an increased yield of 77-83% 0

The proposed method eliminates the need to use hard-to-reach 2-amino selenophenols, shortens the process time, and significantly simplifies the procedure for selecting the target product “1

EXAMPLE 1 7-HydroxynaphthoЈ2,3-a phenoselenazin-8,1 3-dione, 2 g (0.0049 mol) 1-azido-2-phenylseleno-4-hydroxyanthraquinone is kept for 25-30 minutes at 20 ml of boiling dimethylforma- 1 mide. Then the reaction mass is cooled, the precipitated precipitate is filtered off, drink 20 ml of ether, dried. Yield of 7-hydroxynna 2, 3-a | phenoselenanin 8.13-dione 1.54 g (80.2%). M.p. 2 2SS ° C UV / hc / Amac. nm (Igg)) (chloroform): 650- (4.01); 704 (3.90). Found: N 3.88; 3.62. Calculated,%: 11

2

TI p-mime 2, 7-hydroxynaph-tgr 5 phenoselenazin-8,1 3-dione. / (g (o, 0058 mol) of 1-azido-2-phenyl-g-epano-4-hydroxylthraquinone vivate 15-20 min in 35 ml of boiling water

o-dichtorobenzene Then the reaction mass is cooled, the precipitated precipitate is from Phil: i 1 1 1, washed with 20-25 ml ether .. o The yield of 7-hydroxynaphto 2, - phenosepo j nH-I, 13-dione 2.28 g

(6- g, t i-i: .55QC. UV spectrum,

fC HM dgЈ) (chloroform): 650 (4.01) 5 704 (3.90). Found,%: N 3.38; 3.62 „Calculated,%: N 3.57. II p and me 3. 3. 7-hydroxynaphthoЈ2,3-a | phenoseleene-8, J 3-dione. J g (0.0024 mol) of I-azido-2-phenylseleno-4-hydroxyanthraquinone is kept for 20-25 minutes in 20 ml of boiling o-xylene. Then the reaction mass is cooled, the precipitated precipitate is filtered off, washed with 10 ml of ether, dried. Yield of 7-hydroxynaphtho, noslenaein-8,13-dione, 0.78 g (83.87%), m.p. 255 ° C. UV-C pitch is difficult “s, nm, (lgЈ) (chloroform): 650 (4.04); 704 (3890). Found,%: N 3.71; 3.62. Calculated,%: N, 3.57.

Claims (1)

Invention Formula The method of producing 7-hydroxynaph-, 3-a phenoselenazin-8, I3-dione using substituted anthraquinone in an organic solvent at its boiling point, characterized in that, with the aim of increasing the yield of the target product and simplifying the technology, as a anthraquinone use 1-azido-2-phenylseleno-4-hydroxyanthra quinone, as an organic solvent - o-xylene or o-dichlorobenzene, or dimethylformamide and the process of boiling these substances is carried out for 15-30 min.