<i>N</i>-Azolylmethyl ketones as building blocks in heterocyclic synthesis: Synthesis of new polyfunctionally substituted azolylarylazophenols, azolylpyridones and azolylthiophenes
作者:Balkis Al-Saleh、Morsy Ahmed El-Apasery、Mervat Mohammed Abdelkhalik、Mohammed Hilmy Elnagdi
DOI:10.1002/jhet.5570400125
日期:2003.1
2-arylhydrazonopropanals 3a-c to yield polyfunctionally substituted azolylarylazophenols 5 and 8. The reaction of 1b and 2 with phenylisothiocyanate in the presence of α-haloketones afforded the azolylthiophenes 12a,b and 13a,b. The reaction of 20 with α-haloketone afforded 5-benzotriazol-1-yl-6-methyl-2-(2-oxopropylsulfanyl)nicotinonitrile 21 that was utilized as building blocks for the synthesis of condensed
标题化合物1a-b和2与2-芳基肼基丙醛3a-c反应,得到多官能取代的偶氮基芳基偶氮苯酚5和8。1b和2与苯基异硫氰酸酯在α-卤代酮存在下反应,得到偶氮基噻吩12a,b和13a,b。 。20与α-卤代酮的反应提供了5-苯并三唑-1-基-6-甲基-2-(2-氧丙基硫基)烟腈21,其被用作合成缩合吡啶的结构单元。将化合物21与二甲基甲酰胺二甲基缩醛缩合,得到噻吩并[2,3 - b ]吡啶-3-基-N,N-二甲基甲am衍生物22。将其进一步用氢化钠环化成1 H-二硫代[2,3- b]。4,5- b'] dipyridin-4-one衍生物23。