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CAS No. : | 149-91-7 | MDL No. : | MFCD00002510 |
Formula : | C7H6O5 | Boiling Point : | - |
Linear Structure Formula : | C6H2(OH)3COOH | InChI Key : | - |
M.W : | 170.12 | Pubchem ID : | - |
Synonyms : |
3,4,5-Trihydroxybenzoic acid;NSC 20103;HSDB 2117;NSC 674319
|
Chemical Name : | 3,4,5-Trihydroxybenzoic acid |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
9% | With dihydrogen peroxide; horseradish peroxidase; In acetone;pH 5.0; | General procedure: A: Catechol (110 mg, 1.00 mmol ) and pyrogallol (126 mg, 1.00 mmol) were dissolved in a mixture of acetone-pH 5.0 phosphate-citrate (1 : 1=0.2 M Na2HP04: 0.1 M citrate) buffer (1 :5 v/v, 5 lnL), which contained 0.1 mg horseradish peroxidase (cas 9003-99-0, 5KU, Fisher). Four aliquots of 3percent H2O2 (2 mL each) were added eveiy 10 min over 40 min while stirring. After 2-3 h, the resulting orange precipitate was filtered off, washed with water (3 x 6 mL) and dried under high vacuum condition to give a mixture of 2 and NCI35676 (purpurogallin). The mixture was purified by flash chromatography on silica gel, using ethyl acetate/hexane ( 1 :4) as eluent, to give 2 as an orange solid (23 mg, 1 1 percent). 3,4,6-trihydroxy-5H-benzo[7]annulen-5-one (2). Following the general method IA, gave 2 as an orange solid (23 mg, 11 percent). Following the general method IA, using <strong>[363-52-0]3-fluorocatechol</strong> (128 mg, 1.00 mmol) instead of catechol, gave an orange solid. The mixture was purified by flash chromatography on silica gel, using ethyl acetate/hexane (1 :4) as eluent, to give 3 as an orange solid (20 mg, 9 percent): NMR (300 MHz, DMSO) delta 15.45 (s, 1H), 9.81 (s, 2H), 7.53-7.37 (m, 2H), 7.19 (dd, J= 9.6, 0.7 Hz, 1H), 6.86 (dd, J= 11.4, 9.6 Hz, 1H); 13C NMR (75 MHz, DMSO) delta 184.20, 155.77, 154.17, 152.58, 134.70, 132.41, 124.98, 118.61, 118.17, 110.76, 110.50; HRMS (ESI): calcd for: C?H7F04 [M-H]' = 221.0255, obsd [M-H]"= 221.0255. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With zinc(II) chloride; trichlorophosphate; at 80℃; for 2h; | 3,4,5-trihydroxybenzoic acid, 3-fluorobenzene-l,2-diol, anhydrous zinc chloride and phosphorous oxychloride were combined in a round bottom flask, stirred and heated to 80°C for 2 hours. After cooling, the product was precipitated from the reaction mixture by addition of a mixture of water and ice. The product was washed with water, treated with a solution of sodium bicarbonate, washed again with water and finally recrystallized from aqueous solution to yield the desired product. |