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El-Diwani, H.I.,Nakkady, S.S.,El-Shabrawy, O.,Gohar, A-K.M.N.,Hishmat, O.H. The Pharmaceutical Society of Korea 1988 Archives of Pharmacal Research Vol.11 No.1
Several 4-cyano-1-benzofuranyl-1-butanone derivatives were synthesized and screened for potential antiinflammatory and analgesic activities. The effect of structural variation of these molecules on biological activities was systematically examined. Among these compounds $V_a,\;V_c\;and\;VI_e$ were found to demonstrate a significant antiinflammatory effect. Compounds $VI_e,\;V_a,\;I_d,\;I_band\;VII_f$ were also significantly effective as analgesic ones.
El-Diwani, Hoda I. The Pharmaceutical Society of Korea 1995 Archives of Pharmacal Research Vol.18 No.1
The Hantzsh reaction of 7-hydroxy-8-methoxy-2-oxo-2H-benzopyran-6-carboxaldehyde (1) with ethyl acetoacetate and ammonia yields the dihydropyridine derivative 2 together with the pyridine derivative 3 and the eight membred ring derivative 4. Reaction of 1 with ethyl cyanoacetate and malononitrile gives the iminodicoumarin derivatives 5 and 6 respectiely. The latter compound was reacted with butan-2-one and acetophenone to produce the Michael adduct 71, b and the 2-aminopyridine derivatives 8a, b.
Synthesis of Furodiketochroman and bis-Furocoumarin Derivatives and their Biological Activity
Hishmat, O.H.,El-Shabraway, O.A.,El Diwani, H.I.,Fawzy, N.M. The Pharmaceutical Society of Korea 1988 Archives of Pharmacal Research Vol.11 No.2
A number of substituted furodiketochroman derivatives ($lll_{a-f}$) have been synthesized by fusion of aromatic aldehydes with 5-hydroxybergapten and 5-hydroxyisopimpinellin. On the other hand, when the reaction was carried out in a solvent, the corresponding bis-furoccumarin derivatives ($lV_{c-n}$) were obtained. The anticoagulant effect of compounds $lll_{a,b,d}$ and $lv_{b,c,f,g,i,k}$ was tested. They failed to demonstrate any significant effect. The effect of the tested compounds on the arterial blood pressure was studied. Compounds $lV_c$, $lll_d$, $lll_b$, $lV_b$, $lV_k$ and $lV_i$ showed lowering effects on the normal systolic blooc pressure of anaesthetized rats in a decreasing manner.