Design, synthesis, antimicrobial, anti-inflammatory and analgesic activity of novel isoxazolyl pyrimido[4,5-b]quinolines and isoxazolyl chromeno[2,3-d]pyrimidin-4-ones
作者:E. Rajanarendar、M. Nagi Reddy、S. Rama Krishna、K. Rama Murthy、Y.N. Reddy、M.V. Rajam
DOI:10.1016/j.ejmech.2012.07.029
日期:2012.9
Novel series of 2-methyl-3-3-methyl-5-[(E)-2-phenyl-1-ethenyl]-4-isoxazolyl}-3,4-dihydropyrimido[4,5-b]quinolin-4-ones 5 and 3-3-methyl-5-[(E)-2-phenyl-1-ethenyl]-4-isoxazolyl}-3,4-dihydro-2H-chromeno[2,3-d]pyrimidin-4-ones 7 have been synthesized from isoxazolyl cyanoacetamide synthon 2. Compound 2 was obtained by reaction of 4-amino-3-methyl-5-styrylisoxazole 1 with ethyl cyanoacetate. Isoxazolyl
2-甲基-3- 3-甲基-5-[(E)-2-苯基-1-乙烯基] -4-异恶唑基} -3,4-二氢嘧啶[4,5 - b ]喹啉-4的新系列-酮5和3- 3-甲基-5 - [(ë)-2-苯基-1-乙烯基] -4-异恶唑基} -3,4-二氢-2- ħ -chromeno [2,3- d ]嘧啶从异恶唑基氰基乙酰胺合成子2合成了-4-ones 7。通过使4-氨基-3-甲基-5-苯乙烯基恶唑1与氰基乙酸乙酯反应获得化合物2。异恶唑基嘧啶并[4,5 - b ]喹啉-4-酮5是从化合物2经与o的缩合得到的。-硝基硝基苯甲醛,然后用SnCl 2处理,随后进行串联N-乙酰化,然后用乙酸酐进行环脱水。通过与水杨醛反应并随后与甲醛环化,将化合物2转化为异恶唑基铬诺[2,3 - d ]嘧啶-4-酮7。化合物2 – 7的特征在于IR,1 H NMR,13 C NMR和质谱数据。对标题化合物5a – f和7a –