14963-97-4Relevant articles and documents
Regioselective Reduction of Anhydrides by L-Selectride
Makhlouf, Mansour A.,Rickborn, Bruce
, p. 4810 - 4811 (1981)
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Methylation and Hydroxylation Studies on Aloe-emodin
Alexander, Jose,Bhatia, Ashok V.,Mitscher, Lester A.,Omoto, Shoji,Suzuki, Toshio
, p. 20 - 24 (1980)
The chemistry of aloe-emodin (3) has been explored with a view toward its use as a synthon for the regiospecific synthesis of adriamycin and analogues of it.Routes for satisfactory large-scale monomethyl ether formation at C8 (4) and regiospecific introduction of a phenolic oxygen function at C4 (21) are described.Interesting side reactions were encountered, including an apparent peri O to O acyl wandering reaction during methylation and a reductive debromination reaction during displacement of an aryl bromide by methanolic methoxide.
Synthetic process of rhein
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Paragraph 0019; 0021; 0024, (2018/03/07)
The invention relates to a synthetic process of rhein. The synthetic process comprises the steps of: adopting 2,3-dimethyl phenol as a raw material, performing methylation and oxidation to obtain 3-methoxy phthalic acid, performing dehydration by using acetic anhydride to obtain acid anhydride, then performing a Friedel-Crafts reaction between the obtained acid anhydride and excess methyl anisoleunder the action of aluminum trichloride to obtain the product, and then conducting cyclization by using sulfuric acid to obtain an intermediate chrysophanol, performing acetylation on the obtained chrysophanol, performing oxidation to obtain diacerein, and finally carrying out deacetylation to synthesize rhein.
Metallo-β-lactamase inhibitory activity of 3-alkyloxy and 3-amino phthalic acid derivatives and their combination effect with carbapenem
Hiraiwa, Yukiko,Morinaka, Akihiro,Fukushima, Takayoshi,Kudo, Toshiaki
, p. 5841 - 5850 (2013/09/12)
3-Alkyloxy and 3-amino phthalic acid derivatives were found to have metallo-β-lactamase inhibitory activity. Among them, 3-amino phthalic acid derivatives showed both potent activity against metallo-β-lactamase, IMP-1 inhibitory activity and a strong combination effect with biapenem (BIPM), carbapenem antibiotic. In particular, the 4′-hydroxy-piperidine derivative showed strong IMP-1 inhibitory activity and a combination effect with various antibiotics.