Reaction of 5-arylmethylene-2-thioxo-4-thiazolidinones with some phosphonium ylides. Synthesis of thiazolidino[4,5-x]-fused compounds
作者:Wafaa M. Abdou、El-Sayed M.A. Yakout、Neven A.F. Ganoub
DOI:10.1016/0040-4020(95)00705-d
日期:1995.10
triethylamine led to the formation of the pyrone derivatives (8). Reaction of 4a,b with oxoylide (5c), afforded the pyranderivatives (10). On the contrary, the reaction of 4a,b with 5d underwent 1,2-addition reaction to yield the new ylides (12a,b) as a sole reaction product. Except the last reaction of 4a,b with 5d, other reactions afforded, in each instance, the olefinated products (9a–d) and (11a
已对标题化合物(4a)和(4b)与某些磷鎓叶立德(5a–d)的反应进行了相当详细的研究。在回流的乙酸乙酯中,在三乙胺存在下,在噻唑烷酮(4a ,b)上使用维蒂希试剂(5a,b),共轭二氢呋喃[2,3 - d ]噻唑-2(3H)-ones(7a在回流的甲苯中以及在三乙胺的存在下进行反应时获得了-d),从而导致了吡喃酮衍生物的形成(8)。的反应图4A,4B与oxoylide(图5c),得到pyranderivatives(10)。相反,使4a,b与5d反应进行1,2-加成反应,以产生作为唯一反应产物的新叶立德(12a,b)。除了4a,b与5d的最后反应外,其他反应在每种情况下均以11-18%的产率提供烯化产物(9a–d)和(11a,b)。