Some heterocycles, namely 2-amino-4H-pyran-3-carbonitriles, were synthesized in a three-component reaction from substituted benzaldehydes, malononitrile, and ethyl acetoacetate. These heterocycles have been converted subsequently into 4H-pyrano[2,3-d]pyrimidine ring by ring-closing reaction with acetic anhydride in the presence of the concentrated sulfuric acid as catalyst. The successive alkylation reaction of lactam NH bond on pyrimidine-4-one ring was carried out using propargylic bromide in dry acetone in the presence of anhydrous potassium carbonate. The click chemistry of 3-propargyl-4H-pyrano[2,3-d]pyrimidine compounds has been accomplished by reaction with tetra-O-acetyl-α-d-glucopyranosyl azide using the metal-organic framework [email protected] as a catalyst in absolute ethanol. All the synthesized 1H-1,2,3-triazoles 8a–y were screened for their in vitro Mycobacterium tuberculosis protein tyrosine phosphatase B (MtbPtpB) inhibition. Kinetic studies of the most active compounds 8v, 8x, and 8y showed their competitive inhibition toward the MtbPtpB enzyme. The detailed structure-activity relationship (SAR) in vitro and in silico studies suggested that the interaction of Arg63 amino acids with anion type of para-hydroxyl group via a salt bridge of iminium cation was essential for strong inhibitory activity against MtbPtpB.

由取代的苯甲醛，丙二腈和乙酰乙酸乙酯在三组分反应中合成了一些杂环，即2-氨基-4 H-吡喃-3-腈。通过在浓硫酸作为催化剂的存在下与乙酸酐进行闭环反应，这些杂环随后被转化为4H-吡喃并[2,3- d ]嘧啶环。在无水碳酸钾存在下，使用炔丙基溴在干燥的丙酮中，进行嘧啶-4-酮环上内酰胺NH键的连续烷基化反应。3-炔丙基-4H-吡喃并[2,3- d ]嘧啶化合物的点击化学已通过与四-O-乙酰基-α- d反应而完成-使用金属-有机骨架[受电子邮件保护]作为无水乙醇中的催化剂的吡喃葡萄糖基叠氮化物。筛选所有合成的1 H- 1,2,3-三唑8a-y的体外结核分枝杆菌蛋白酪氨酸磷酸酶B（MtbPtpB）抑制作用。活性最高的化合物8v，8x和8y的动力学研究表明，它们对MtbPtpB酶具有竞争性抑制作用。详细的结构-活性关系（SAR）的体外和计算机模拟研究表明，Arg63氨基酸与阴离子型对羟基的相互作用是通过 亚胺阳离子的盐桥对MtbPtpB具有很强的抑制活性。