The enantioselective synthesis of novel C-linked spiroacetal-triazoles 10 is reported. The key step involves reaction of acetylenic spiroacetal 11 with several azides by the Copper-Catalysed Azide–Alkyne Cycloaddition (CuAAC). The biologically privileged spiroacetal scaffold 11 was prepared from silyl-protected Weinreb amide 19 using several reliable Grignard additions and a highly diastereoselective enzymatic kinetic resolution.
报道了新型C-连接的螺
环醚-三唑10的对映选择性合成。关键步骤涉及
乙炔基螺
环醚11与几种
叠氮化物通过
铜催化
叠氮-
炔烃环加成反应(Cu
AAC)反应。
生物学特权的螺
环醚框架11是通过几个可靠的格林雅反应和高度的非对映选择性酶促动力学分辨率,将
硅保护的魏纳布酰胺19制备而成。