Studies on the reactions of cyclic oxalyl compounds with hydrazines or hydrazones : Synthesis and reactions of 4‐benzoyl‐1‐(3‐nitrophenyl)‐5‐phenyl‐1
<i>H</i>
‐pyrazole‐3‐carboxylic acid
作者:Ahmet Şener、M. Kasim Şener、Ishak Bildmci、Rahmi Kasimogullari、Yunus Akçamur
DOI:10.1002/jhet.5570390503
日期:2002.9
1H-pyrazole-3-carboxylic acid 2, obtained from the furan-2,3-dione 1 and N-Benzylidene-N'-(3-nitrophenyl) hydrazine, was converted via reactions of its acid chloride 3 with various alcohols or N-nucleo-philes into the corresponding ester or amide derivatives 4 or 5, respectively. Nitrile 6 and anilino-pyrazole acid 7 derivatives of 2 were also obtained by dehydration of 5a in a mixture of SOCl2 with DMF and reduction
由呋喃-2,3-二酮1和N-苄叉基-N '-(3-硝基苯基)肼制得的1 H-吡唑-3-羧酸2通过其酰氯3与各种醇的反应而转化。或N-亲核试剂分别变成相应的酯或酰胺衍生物4或5。腈6和苯胺基吡唑酸7个的衍生物2也通过脱水而获得图5A中的SOCl的混合物2用DMF和减少2与多硫化钠分别。而环缩合反应2或7与苯基肼或水合肼和6与仅无水肼分别导致吡唑并[3,4- d ]-哒嗪酮8和吡唑并[3,4- d ]哒嗪胺9的衍生物。2与2-肼基吡啶并reaction反应生成并吡唑酸衍生物10,将其脱羧得到to并吡唑衍生物11。吡唑并[4,3- d ]恶嗪酮12和2-喹啉基吡唑并[3,4- d ]哒嗪13衍生物也通过环戊二烯的缩合反应制备。分别与盐酸羟胺和乙醛分别为2和7。