Novel synthesis of<i>N</i>-{6-aryl-4-[(<i>E</i>)-2-furylmethylene]-1,2,3,4-tetrahydro-3-oxopyridazin-1 -ylcarbonyl}-<i>p</i>-toluenesulfonamides and<i>N</i>-{5-[(<i>E</i>)-1-aroylmethyl-2-(2-furyl) vinyl]-1,3,4-oxadiazol-2-yl} -<i>p</i>-toluenesulfonamides
作者:Abdel-Sattar S. Hamad、Ahmed I. Hashem
DOI:10.1002/jhet.5570390634
日期:2002.11
Novel N-6-aryl-4-[(E)-2-furylmethylene]-1,2,3,4-tetrahydro-3-oxopyridazin-1 -ylcarbonyl}-p-toluene-sulfonamides 4a-d were prepared by the reaction of (E)-2-aroylmethyl-3-(2-furyl) acrylohydrazides 2a-d with tosylisocyanate. This has been shown to occur by initial formation of (E)-2-aroylmethyl-3-(2-furyl)-N'-(tosylaminocarbonyl) acrylohydrazides 3a-d followed by acid catalyzed cyclization to afford
新颖Ñ - 6 -芳基-4 - [(ë)-2- furylmethylene] -1,2,3,4-四氢-3-氧代哒嗪-1-基羰基} - p -甲苯磺酰胺图4a-d是由制备(E)-2-芳酰基甲基-3-(2-呋喃基)丙烯酰肼2a-d与甲苯磺酰基异氰酸酯的反应。已经表明,这是通过首先形成(E)-2-芳酰基甲基-3-(2-呋喃基)-N ′-(甲苯磺酰基氨基羰基)丙烯酰肼3a-d,然后酸催化环化生成N- 5-[(E)-1-芳酰基甲基-2-(2-呋喃基)乙烯基] -1,3,4-恶二唑-2-基}-对甲苯磺酰胺5a-d。