SYNTHESIS OF SOME NEW THIENO[2,3-<i>b</i>]PYRIDINES, PYRIDO[3′,2′:4,5]-THIENO[3,2-<i>d</i>]PYRIMIDINES AND PYRIDO[3′,2′:4,5]THIENO[3,2-<i>d</i>][1,2,3]-TRIAZINES
作者:A. E. Abdel-rahman、E. A. Bakhite、O. S. Mohamed、E. A. Thabet
DOI:10.1080/10426500008076538
日期:2000.1.1
Thorpe-Ziegler cyclization to afford the corresponding 3-amino-4-aryl-2-functionallized-cyclopenta[e]thieno [2,3-b]pyridines (5a-c and 6a-i). Most of the latter thienopyridines were used as synthons for the target cyclopenta[5′,6′]pyrido[3′,2′:4.5]thieno[3,2-d]pyrimidines and cyclopenta[5′,6′]. pyrido[3′,2′:4,5]thieno[3,2-d][1,2,3]triazines.
摘要 4-芳基-3-氰基-2-取代-甲基硫代环戊基[b]吡啶(3a-c和4a-i)是由4-芳基-3-氰基环戊基[b]吡啶-2(1H)-硫酮反应制备的。 (2a-c) 分别与氯乙腈或氯-N-芳基乙酰胺。在沸腾的乙醇中用乙醇钠处理这些产物后,它们进行分子内 Thorpe-Ziegler 环化,得到相应的 3-amino-4-aryl-2-functionalized-cyclopenta[e]thieno [2,3-b]pyridines (5a -c 和 6a-i)。大多数后者的噻吩并吡啶被用作目标环戊二烯[5',6']吡啶并[3',2':4.5]噻吩并[3,2-d]嘧啶和环戊二烯[5',6']的合成子。吡啶并[3',2':4,5]噻吩并[3,2-d][1,2,3]三嗪。