Tri-component reaction of 2-alkyl-4,5-dichloropyridazin-3(2H)-ones: synthesis of 5-cyano-5-(pyrimidin-2-yl)-2,7-dialkyl-5H-dipyridazino-[4,5-b:4,5-e]-4H-thiopyran-1,6-dione and 2-(4-cyanophenoxy) pyrimidine
作者:Jung-Won Park、Jeum-Jong Kim、Ho-Kyun Kim、Hyun-A Chung、Su-Dong Cho、Sang Gyeong Lee、Motoo Shiro、Yong-Jin Yoon
DOI:10.1016/j.tet.2005.03.071
日期:2005.5
Reaction of 2-alkyl-4,5-dichloropyridazin-3(2H)-ones with p-cyanophenol and 2-mercaptopyrimidine in the presence of base gave 2,4,5-trisubstituted-pyridazin-3(2H)-ones 4–9, 2-(4-cyanophenoxy)pyrimidine (10) and 5-cyano-5-(pyrimidin-2-yl)-2,7-dialkyl-5H-dipyridazino[4,5-b:4,5-e]-4H-thiopyran-1,6-diones 11 as a novel heterocycle.
2-烷基-4,5-二氯哒嗪-3(2 H)-one与对氰基苯酚和2-巯基嘧啶在碱存在下的反应得到2,4,5-三取代-哒嗪-3(2 H)-ones 4 - 9,2-(4-氰基苯氧基)嘧啶(10)和5-氰基-5-(嘧啶-2-基)-2,7-二烷基-5- ħ -dipyridazino并[4,5- b:4,5 - ë ] -4- ħ噻喃-1,6-二酮11作为新的杂环。