Spiro-oxindoles, epi-Spirotryprostatin A and its analogues were prepared from a tactical combination of cascade catalytic bimetallic Pd (0)/Ag(I), intramolecular Heck and subsequent imine → azomethine ylide → 1,3-Dipolar cycloaddition reactions. The cascade features in situ generation of azomethine ylides and dipolarophiles and produces two new rings together with three stereocentres in good to excellent
从级联催化双
金属Pd(0)/ Ag(I),分子内Heck以及随后的
亚胺→亚甲次基叶立德→ 1,3-偶极环加成反应的战术组合制备螺-羟
吲哚,epi-Spirotryprostatin A及其类似物。级联反应具有原位生成甲
亚胺基
亚胺和双极性亲核试剂的特性,并产生两个新的环以及三个立体中心,收率好至极好。