作者:Hardesh K. Maurya、Sanjay K. Gautam、Ramendra Pratap、Vishnu K. Tandon、Abhinav Kumar、Vikas Bajpai、Brijesh Kumar、Vishnu Ji Ram
DOI:10.1039/c2ob25173f
日期:——
sequential fusion of naphthalene, benzo/naphtho[b]oxepine and thiochromene rings with pyran and pyrimidine ring systems to give ‘U and Z’ shaped structural frameworks is reported. The methodology is based on the synthesis of pyran fused intermediates, 1-methylthio-3-oxo-5,6-dihydro-3H-benzo[f]chromene-2-carbonitrile (3), 4-methylthio-2-oxo-5,6-dihydro-2H-benzo/naphtho[b]pyrano[2,3-d]oxepine-3-carbonitriles (10
合成三类新的杂芳烃,方法是通过顺序融合 萘,苯并/萘并[ b ]奥西平 和硫代环与 吡喃并报道了嘧啶环系统产生“ U和Z”形的结构框架。该方法是基于综合吡喃 熔融中间体 1-甲硫基-3-氧代-5,6-二氢-3 H-苯并[ f ]亚甲基-2-腈(3),4-甲硫基-2-氧代-5,6-二氢-2 ħ苯并/萘并[ b ]吡喃并[2,3- d ]氧杂-3-腈(10,20)和4-甲硫基2-氧代-2,5-二氢硫代色素[4,3- b ]吡喃-3-腈(15)的反应2-四氢萘酮,苯并/萘并[ b ]氧杂环丁酮-5-酮和硫代色素-4-酮与2-氰基-3,3-二甲基硫代丙烯酸甲酯分别。中间体的进一步的缩合3,10,20和15与导致四环“U”的形成脒状4-氨基-2-芳基-7,8-二氢-5-氧代-5- ħ -萘并[2,1- b ] pyrimido [4,5- d ] pyrans(8)和'Z'形的4-氨基-2-芳基-5-氧代-氧代12