title: Synthesis and antihepatotoxic activity of some heterocyclic compounds containing the 1,4-dioxane ring system.
abstract: Silymarin isolated from Silybum marianum is a mixture of three isomers, silybin (1), silydianin (2) and silychristin (3). Silybin is the most active antihepatotoxic agent, and contains a 1,4-dioxane ring in addition to a flavonoid moiety. Based on the skeleton of silybin, we prepared some flavones and coumarins containing the 1,4-dioxane ring system and evaluated them for antihepatotoxic activity against carbon tetrachloride induced hepatotoxicity in albino rats. The degree of protection was determined by measuring biochemical parameters such as serum glutamic oxaloacetic transaminase (SGOT), serum glutamic pyruvate transaminase (SGPT), alkaline phosphatase (ALKP), total protein (TP) and total albumin (TA). The compounds namely 3',4'(1",4"-dioxino) flavone (4f), and 3',4'(2-hydroxy methyl, 1",4"-dioxino) flavone (4g) were found to exhibit a significant activity comparable to standard drug silymarin (silybon-70). Other compounds also exhibited good activity. The structure activity relationship (SAR) was also studied, and where the flavonoid analogues containing a hydroxy methyl group at position-2" in the dioxane ring exhibited superior antihepatotoxic activity in comparison to coumarin derivatives.
authors.affiliation: Antihepatotoxic Research Laboratory, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Jamia Hamdard, Hamdard Nagar, New Delhi, India. bahmed@ksu.edu.sa
authors.forename: B
authors.initials: B
authors.lastname: Ahmed
authors.forename: S A
authors.initials: SA
authors.lastname: Khan
authors.forename: T
authors.initials: T
authors.lastname: Alam
mesh_terms: D000818:Animals; D002252:Carbon Tetrachloride Poisoning / Q000517:prevention & control; D056486:Chemical and Drug Induced Liver Injury / Q000517:prevention & control*; D004146:Dioxanes / Q000138:chemical synthesis* / Q000627:therapeutic use*; D005260:Female; D006571:Heterocyclic Compounds / Q000138:chemical synthesis* / Q000627:therapeutic use*; D007202:Indicators and Reagents; D008111:Liver Function Tests; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D020011:Protective Agents / Q000737:chemistry / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D012838:Silymarin / Q000737:chemistry / Q000494:pharmacology
chemical_list: D004146:Dioxanes; D006571:Heterocyclic Compounds; D007202:Indicators and Reagents; D020011:Protective Agents; D012838:Silymarin