Synthesis of 5,6'-dihydroxy-2',3',4',6,7-pentamethoxyflavone.
نویسندگان
چکیده
منابع مشابه
Synthesis of 1,5-Dihydroxy-9,10-Anthraquinone
The synthesis of 1,5-dihydroxy-9,10-anthraquinone (17); (1,5-DHA) was accomplished during, attempts towards the synthesis one of its derivatives called anthralin (1,8-dihydroxy-9-anthrone) which is known as an antipsoriasis drug since 1916 [1]. This work is a new reigiospecilic preparation of 1,5-DHA based on Friedel-Crafts reaction starting from 1,4-dimethoxybenzene. This synthetic route, ...
متن کاملSYNTHESIS OF (k) - 6,8-DIHYDROXY-3- ISOPROPYL-7-METHYLISOCHROMAN
The title isochroman ( 8 ) was synthesized as a suitable substrate for acetoxylation studies leading to an intermediate of type (4), expected to afford, on condensation with diketen, the fungal metabolite "rotiorin" type linear product (1). Cyclocondensation of alcohol (6), obtained by the reduction of ketone (5) with paraform in the presence of anhydrous aluminum chloride afforded the dim...
متن کاملsynthesis of 1,5-dihydroxy-9,10-anthraquinone
the synthesis of 1,5-dihydroxy-9,10-anthraquinone (17); (1,5-dha) was accomplished during, attempts towards the synthesis one of its derivatives called anthralin (1,8-dihydroxy-9-anthrone) which is known as an antipsoriasis drug since 1916 [1]. this work is a new reigiospecilic preparation of 1,5-dha based on friedel-crafts reaction starting from 1,4-dimethoxybenzene. this synthetic route, in a...
متن کاملSynthesis and Properties of Poly[p-(2,5-dihydroxy)-phenylenebenzobisoxazole] Fiber
The novel polymer poly[p-(2,5-dihydroxy)-phenylenebenzobisoxazole] (PBOH) fiber was synthesized in the presence of 2,5-dihydroxyterephthalicacid (DHTA) and 4,6-diamino-1,3-benzenediol in poly(phosphoric acid) (PPA) using typical polycondensation conditions. The crystalline solutions of liquid PBOH in PPA were spun into fibers using dry-jet wet spinning. Furthermore, the thermostability and mech...
متن کاملSYNTHESIS OF 1, l1-DIHYDROXY-2,2'- (THIODIMETHYLENE) BIS-9(1 OH)-ANTHRONE
An efficient synthesis of the 1,l'-dihydroxy-2,2'-(thiodimethy1ene)bis-9(10H)- anthrone (5) is described. Reaction of 1 -methoxy-2-(bromomethy1)-9,lOanthraquinone (1) with excess sodium sulfide in ethanol, demethylation to the corresponding hydroxy and subsequent selective reduction produced the title compound in high yield.
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1984
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.32.4217