两步法合成海洋起源的溴化生物碱wilsoniamines A(1)和B(2),其分离自澳大利亚苔藓虫Amathia wilsoni Kirkpatrick,具有新颖的hexahydro-1 H -pyrrolo [1,2- c ]咪唑-1-酮描述了铃声系统。通过(2,4,6-三溴-3-甲氧基苯基)乙醛与(S)-N的缩合反应构建六氢-1 H-吡咯并[1,2 - c ]咪唑-1-环核心体系-甲基吡咯烷-2-羧酰胺为关键步骤。通过在动力学或热力学条件下进行关键缩合反应来控制两种差向异构天然产物中取代的苄基侧链的取向。
两步法合成海洋起源的溴化生物碱wilsoniamines A(1)和B(2),其分离自澳大利亚苔藓虫Amathia wilsoni Kirkpatrick,具有新颖的hexahydro-1 H -pyrrolo [1,2- c ]咪唑-1-酮描述了铃声系统。通过(2,4,6-三溴-3-甲氧基苯基)乙醛与(S)-N的缩合反应构建六氢-1 H-吡咯并[1,2 - c ]咪唑-1-环核心体系-甲基吡咯烷-2-羧酰胺为关键步骤。通过在动力学或热力学条件下进行关键缩合反应来控制两种差向异构天然产物中取代的苄基侧链的取向。
Acid mediated synthesis of thiazolines, thiazoles and enamide derivatives from methyl enol ethers: Application towards synthesis of wilsoniamine B
作者:Tapan Kumar Jena、Faiz Ahmed Khan
DOI:10.1016/j.tetlet.2020.151675
日期:2020.3
metal-free synthesis of thiazolines, dihydrothiazole and enureas or thioureas from methyl enol ether with urea or thiourea derivatives in the presence of TFA (trifluoroacetic acid) are reported here. This synthetic protocol involves the formation of two bonds, C-N as well as C-S, in onestep for the synthesis of thiazoline derivatives, dihydrothiazoles and a direct C-N bond for the synthesis of enamides