A new series of anionic surfactants with dual type of activity antimicrobial and surface activity have been synthesized by reaction of 4H‐3,1‐benzoxazinone 3 and quinazolinethione 10 with nitrogen nucleophiles and activated olefinic compounds. The compounds were evaluated for their surface activity as well as their antimicrobial and biodegradability properties.

Heterocycles Derived from 2-Amino-5-(6-(dibenzothien-4-yl)-4,5dihydropyridazin-3-yloxymethyl)-1,3,4-thiadiazole.-With a view to obtaining biologically active compounds the title heterocycles, e.g. (III), are prepared. -(WASFY, A. A. F.; NASSAR, S. A.; EISSA, A. M. F.; Indian

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Substituted 6-(1 H-benzimidazol-2-yl)-[1,2,4]triazolo[3,4- a]phthalazine derivatives containing alkyl, aryl, hydroxyl, mercapto, methylthio and formyl substituents at position 3 have been synthesised. Di-[6-(1 H-benzimidazol-2-yl)-3-[1,2,4]triazolo[3,4- a]phthalazin-3-yl]alkanes have been obtained by the use of dicarboxylic acids or their esters in the above condensations. Methylation reactions of the triazolo-phthalazine system are reported.

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