2,7-Dihydroxy-9-fluorenone exporter 42523-29-5 red powder factory supply CAS NO.42523-29-5

2,7-Dihydroxy-9-fluorenone exporter 42523-29-5 red powder factory supply

The preparations for 2,7-dehydroxy-9 ketones are as follows:

1) 2,7-dehydroxy-9-argon acidity: Today's 4,4'-dehydroxy biphenyl-2 finger preparation (II) by heating the non-alkali alkali alkali melts (300 to 325 degrees C), potassium-9-oxycodone (I) 2,7-diast powder is removed and added. When the filling is complete, the reaction is for several hours, after cooling dissolved in ice water, after cooling, after cooling to collect the liquid from the filter and filter. Concentrated chloride, cooling, filtration, and vacuum drying are added to the filter solution to obtain a solid compound in light yellow (II) color.

2) Preparation of 2,7-dehydroxy-9-steron (III): (II) Mix the powder with zinc chloride, heat it to a certain temperature, stir the reaction, cool, add it to water to dissolve, and add a filter. You wash the filter cake neutrally, pick up the filter cake, vacuum dry, get a solid reddish-brown (III) product. Purity is 94. 896％。

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