Thermal Rearrangement of Thiocarbonyl-Stabilised Triphenylphosphonium Ylides Leading to (Z)-1-Diphenylphosphino-2-(phenylsulfenyl)alkenes and Their Coordination Chemistry
作者:R. Alan Aitken、Graham Dawson、Neil S. Keddie、Helmut Kraus、Heather L. Milton、Alexandra M. Z. Slawin、Joanne Wheatley、J. Derek Woollins
DOI:10.3390/molecules29010221
日期:——
While thiocarbonyl-stabilised phosphonium ylides generally react upon flash vacuum pyrolysis by the extrusion of Ph3PS to give alkynes in an analogous way to their carbonyl-stabilised analogues, two examples with a hydrogen atom on the ylidic carbon are found to undergo a quite different process. The net transfer of a phenyl group from P to S gives (Z)-configured 1-diphenylphosphino-2-(phenylsulfenyl)alkenes
虽然硫代羰基稳定的鏻叶立德通常在快速真空热解时通过挤出 Ph3PS 进行反应,以与其羰基稳定的类似物类似的方式产生炔烃,但发现叶立德碳上带有氢原子的两个例子经历了完全不同的过程。在一种新颖的异构化过程中,通过中间体 λ5-1,2-硫代磷酸酯,苯基从 P 到 S 的净转移得到 (Z)-构型 1-二苯基膦-2-(苯基硫基)烯烃。这些被证明是多功能的半不稳定配体,总共制备了七种涉及五种不同过渡金属的配合物。其中四种通过X射线衍射进行表征,其中两种涉及形成五元环金属环的二齿配体,另两种涉及仅通过磷与金属配位的配体。