Unsaturated phosphorus compounds, such as phosphaalkenes and phosphaalkynes, show a versatile reactivity in cycloadditions. Although phosphaketenes (RPCO) have been known for three decades, their chemistry has remained limited. Herein, we show that heteroatom‐substituted phosphaketenes, R3EPCO (E=Si, Sn), are building blocks for silyl‐ and stannyl‐substituted five‐membered heterocycles containing three
不饱和的
磷化合物,例如
磷烯烃和
磷炔烃,在环加成反应中显示出广泛的反应性。虽然phOSphaketenes(R PCO)有三个十年已经知道,他们的
化学反应仍然有限。在本文中,我们表明,杂原子取代的phOSphaketenes,R 3 é PCO(E =的Si,Sn)的,是用于含有三个
磷原子的甲
硅烷基和甲
锡烷基取代的五元杂环积木。杂环阴离子的结构取决于所涉及的
锡原子的性质。尽管甲
硅烷基类似物[P 3 C 2(OSiR 3)2 ] -是芳族1,2,4-三
磷化物,但甲
锡烷基化合物[P(CO)2(PSnR 3)2 ] -是带有离域的OC
PCO片段的1,2,4-三
磷环戊-3-3,5-二酸酯。由于它们的阴离子特性,这些化合物可轻松用作构建基,例如,在制备甲
硅烷基官能化的六
磷二茂铁或母体1,2,4-三
磷环戊-3-3,5-二酸酯[P(CO)2(PH)2 ] -。NMR光谱研究和计算表明,本文介绍的杂环形成反应非常复杂。