Synthesis of new polysubstituted furans incorporating reactive phosphorus ylides or N‑acyliminophosphoranes was achieved by the heterocyclization of flexible α-acyl ketene dithioacetals. This one-pot tandem reaction was initiated by acyl-directed desulfurative Sonogashira coupling, followed by 1,6-addition of phosphine to the in situ-generated enynone and subsequent 5-exo-dig cyclization, as well as
通过柔性α-酰基烯酮二
硫缩醛的杂环化,合成了包含反应性
磷叶立德或N-酰基亚
氨基正膦的新型多取代
呋喃。这一一锅串联反应由酰基引导的脱
硫 Sonogashira 偶联引发,然后将膦 1,6-加成到原位生成的烯酮上,随后进行 5- exo - dig环化以及
磷酸化。两种产物(即α-
磷叶立德与α- N-酰基亚
氨基正膦取代的
呋喃)的选择性由缺电子
乙炔和
铜盐确定。