Photochemical Unmasking of 1,3‐Dithiol‐2‐ones: An Alternative Route to Heteroleptic Dithiolene Complexes from Low‐Valent Molybdenum and Tungsten Precursors
作者:Benedict J. Elvers、Carola Schulzke、Christian Fischer
DOI:10.1002/ejic.201900124
日期:2019.6.23
reaction of the protection group releases carbon monoxide with formation of a 1,2‐dithione, which is capable of oxidizing the electron rich metal precursor due to its non‐innocence character. This procedure works well with molybdenum(0) and tungsten(0) precursors and particularly well with dithiolene ligands bearing aliphatic backbones, which are typically and notoriously difficult to handle when applying
单二硫代苯配合物[Mo(CO)2(dt)(dppe)]和[W(CO)2(dt)(dppe)] dt =环己-1-烯-1,2-二硫醇; 通过光化学方法合成了5,6-二氢-2 H-吡喃3,4-二硫醇和dppe = 1,2-双(二苯基膦基)乙烷}。对二硫代烯配体前体的典型基本去保护作用被光诱导的1,2-二硫代-2-2-1部分的取代所取代。这种有针对性的方法的优点包括更高的收率,更清洁的转化以及连续且精确地监控反应进程的可能性。光诱导的保护基的环周反应释放出一氧化碳,并形成1,2-二硫酮,由于其无毒性,它能够氧化富电子的金属前体特点。此程序适用于钼(0)和钨(0)前驱体,尤其适用于带有脂肪族骨架的二硫代烯配体,在严格的化学程序中通常难以操作。