Regiodivergent Synthesis of Oxadiazocines via Dirhodium-Catalyzed Reactivity of Oxazolidines and α-Imino Carbenes
作者:Jérôme Lacour、Olivier Viudes、Alejandro Guarnieri-Ibáñez、Céline Besnard
DOI:10.1055/a-2072-4537
日期:2023.7
Using electron-rich or electron-poor N-substituted oxazolidines as substrates, selective formation of either ammonium or oxonium ylides is possible in the presence of α-imino carbenes. As such, treatment of 5-membered oxazolidine precursors with N-sulfonyl-1,2,3-triazoles under dirhodium catalysis (2 mol%) affords the regiodivergent synthesis of either 8-membered 1,3,6- or 1,4,6-oxadiazocines upon
使用富电子或缺电子的N-取代恶唑烷作为底物,在 α-亚氨基卡宾存在的情况下,可以选择性地形成铵叶立德或氧鎓叶立德。因此,在二铑催化 (2 mol%) 下用N -磺酰基-1,2,3-三唑处理 5 元恶唑烷前体,可提供 8 元 1,3,6- 或 1,4 的区域发散合成, 6-oxadiazocines 与卡宾的初始 N 或 O 反应性。