Stereoselective synthesis of (<i>E</i>)-halomethylidene[1,3]thiazolo[3,2-<i>a</i>]thieno[3,2-<i>e</i>]pyrimidinium and analogous [1,3]oxazolo[3,2-<i>a</i>]thieno[3,2-<i>e</i>]pyrimidinium halides starting from 3-<i>N</i>-substituted 2-propargylthio(oxy)thieno[2,3-<i>d</i>]pyrimidin-4-ones
作者:Marina Slivka、Andrej Krivovjaz、Mikhailo Slivka、Vasil Lendel
DOI:10.1515/hc-2013-0036
日期:2013.6.1
Abstract A convenient procedure for the stereoselective synthesis of [1,3]thiazolo[3,2-a]thieno[3,2-e]pyrimidinium halides and analogous [1,3]oxazolo[3,2-a]thieno[3,2-e]pyrimidinium halides 5 and 6 is reported. 2-Propargylthio-3-R-thieno[2,3-d]pyrimidin-4-ones and 2-propargyloxy-3-R-thieno[2,3-d]pyrimidin-4-ones were treated with bromine or iodine in AcOH to afford (E)-halomethylidene[1,3]thiazolo[3
摘要 [1,3]噻唑并[3,2-a]噻吩并[3,2-e]嘧啶鎓卤化物和类似物[1,3]恶唑并[3,2-a]噻吩并[3]的立体选择性合成方法,2-e]嘧啶鎓卤化物 5 和 6 被报道。2-Propargylthio-3-R-thieno[2,3-d]pyrimidin-4-ones 和 2-propargyloxy-3-R-thieno[2,3-d]pyrimidin-4-ones 用溴或碘处理AcOH得到(E)-卤代亚甲基[1,3]噻唑并[3,2-a]噻吩并[3,2-e]嘧啶鎓和(E)-卤代亚甲基-[1,3]恶唑并[3,2-a]噻吩并[3,2-e]嘧啶鎓卤化物,分别。