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Dibromofluorescein diacetate

It may be converted into dibromofluorescein diacetate as follows. Reflux a mixture of 10 g. of dibromofluorescein, 40 ml. of redistilled acetic anhydride and 1 drop of concentrated sulphuric acid for 1 hour, pour into water, filter, wash, and dry the resulting diacetate (95 per cent, yield) has m.p. 210°. Upon recrystallisation from acetic anhydride or nitrobenzene, the pure diacetate (colourless or pale yellow plates), m.p. 211°, is obtained. Hydrolysis with alcoholic sulphuric acid gives a quantitative yield of pure dibromofluorescein, m.p. 285°. [Pg.987]


See other pages where Dibromofluorescein diacetate is mentioned: [Pg.1172]   
See also in sourсe #XX -- [ Pg.987 ]

See also in sourсe #XX -- [ Pg.987 ]

See also in sourсe #XX -- [ Pg.987 ]




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Dibromofluorescein

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