Synthesis and Regiospecific Bromination of (2E,4E)-5-Aryl-2-(4-arylthiazol-2-yl)penta-2,4-dienenitrile
作者:N. A. Pakholka、V. V. Dotsenko、B. S. Krivokolysko、K. A. Frolov、N. A. Aksenov、I. V. Aksenova、S. V. Shcherbakov、S. N. Ovcharov、S. G. Krivokolysko
DOI:10.1134/s1070363221040058
日期:2021.4
Abstract The reaction of (2E,4E)-5-phenyl-2-cyano-2,4-pentadienethioamide or (E)-3-(2-nitrophenyl)acrolein and cyanothioacetamide with α-bromoketones afforded new (2E,4E)-5-aryl-2-(4-arylthiazol-2-yl)penta-2,4-dienenitriles. Direct bromination of the latter by the action of bromine in DMF proceeded regiospecifically at the C5 position of the thiazole ring without affecting the diene system and leads
摘要 (2 E,4 E)-5-苯基-2-氰基-2,4-戊二烯硫酰胺或(E)-3-(2-硝基苯基)丙烯醛与氰基硫代乙酰胺与α-溴代酮的反应生成新的(2 E,4 E)-5-芳基-2-(4-芳基噻唑-2-基)戊-2,4-二烯腈。后者在DMF中通过溴的作用直接溴化,在噻唑环的C 5位置上区域专一地进行,而不会影响二烯系统,并导致形成新系列的(2 E,4 E)-5-芳基-2 -(5-溴-4-芳基噻唑-2-基)戊-2,4-二烯腈。