The indolizidine skeleton is one of the most important structural motifs found in numerous biologically active molecules.[1–4] The development of efficient methods for the synthesis of indolizidine alkaloids has been the subject of intense research.[1–4] Recently, we have been devoted to the research of heterocyclizations using alkenoyl ketene dithioacetals as five-carbon 1, 5-dielectrophiles [5, 6] and ethyl isocyanoacetate as both a double Michael ...
