Efficient Synthesis of New Pyrimido[5′,4′:5,6]pyrano[2,3-d]pyrimidine-2,4,6(1H,3H)-triones via the Tandem Intramolecular Pinner–Dimroth Rearrangement, and Their Antibacterial Activity
作者:M. Asadian、A. Davoodnia、S. A. Beyramabadi
DOI:10.1134/s1070363218120290
日期:2018.12
Synthesis of new 8-alkyl-5-aryl-1,3-dimethyl-5,7-dihydro-2H-pyrimido[5′,4′:5,6]pyrano[2,3-d]- pyrimidine-2,4,6(1H,3H)-triones by the high yield reaction of 7-amino-5-aryl-1,3-dimethyl-2,4-dioxo-1,3,4,5- tetrahydro-2H-pyrano[2,3-d]pyrimidine-6-carbonitriles with aliphatic carboxylic acids in the presence of POCl3 is presented. It is probable that synthesis of these new products proceeds via the tandem
合成新的8-烷基-5-芳基-1,3-二甲基-5,7-二氢-2 H-嘧啶[5',4':5,6]吡喃并[2,3 - d ]-嘧啶-2 7-氨基-5-芳基-1,3-二甲基-2,4-二氧杂-1,3,4,5-四氢-2的高产率反应得到4,4,6 (1 H,3 H)-三酮提出了在POCl 3存在下具有脂肪族羧酸的H-吡喃并[2,3 - d ]嘧啶-6-腈。这些新产品的合成很可能是通过分子内Pinner-Dimroth重排进行的。产品经FT-IR,1 H和13 C NMR光谱表征,并评估其对革兰氏+ ve细菌(金黄色葡萄球菌)的抗菌活性。和表皮葡萄球菌)和革兰氏阴性细菌已经(大肠杆菌和绿脓杆菌使用盘扩散法)。