作者:Essam Kh. Ahmed、Mohamed A. Ameen
DOI:10.1016/j.cclet.2009.12.010
日期:2010.6
e derivative 1 with α-halo-carbonyl compounds gave the ortho-substituted intermediates 2a–c which were converted into furo[2,3-b]thiopyrano[4,3-d]pyridines 3a–c by fusion of a furan moiety under basic conditions. Further cyclization of 3a–c led to a fusion of a pyrimidine ring, yielding the tetracyclic products 6, 7 and 8. In addition, condensation of 6 with various aromatic aldehydes afforded the
6-羟基-硫代吡喃并[3,4- c ]吡啶-5-腈衍生物1与α-卤代羰基化合物的反应得到邻位取代的中间体2a - c,它们被转换为呋喃[2,3- b ]呋喃部分在碱性条件下融合而得到的硫代吡喃并[4,3- d ]吡啶3a – c。的进一步环合图3a - Ç导致嘧啶环的融合,得到四环产品6,7和8。另外,凝结6用各种芳族醛得到相应的亚胺9a,b。7的曼尼希反应得到产物10a,b。