Real-Time Mass Spectrometric Investigations into the Mechanism of the Suzuki–Miyaura Reaction
作者:Lars P. E. Yunker、Zohrab Ahmadi、Jessamyn R. Logan、Wenzhao Wu、Tengfei Li、A. Martindale、Allen G. Oliver、J. Scott McIndoe
DOI:10.1021/acs.organomet.8b00705
日期:2018.11.26
Real-time monitoring of the Suzuki–Miyaura reaction using mass spectrometry during sequential addition of the various reaction components suggests that a dynamic series of equilibria exist in these solutions. Depending on conditions, the boronic acid can be dehydrated, deprotonated, hydroxylated (or alkoxylated), or fluorinated. Palladium–phosphine species present include Pd(0) (to which the aryl iodide
An Unexpected Pathway for Ligand Substitution in an Aryl Halide Complex of Palladium
作者:Zohrab Ahmadi、Allen G. Oliver、J. Scott McIndoe
DOI:10.1002/cplu.201300131
日期:2013.7
supposed spectator ligand plays a crucial role in a seemingly simple ligandsubstitution reaction on palladium. Continuous monitoring by ESI-MS reveals all the details of an initial fast displacement of iodide by an incoming phosphine ligand, and of the recoordination of iodide that prompts the displacement of the bidentate ligand actually being substituted. An apparent double substitution and subsequent
Mechanistic features of the copper-free Sonogashira reaction from ESI-MS
作者:Zohrab Ahmadi、Lars P. E. Yunker、Allen G. Oliver、J. Scott McIndoe
DOI:10.1039/c5dt02889b
日期:——
Continuous mass spectrometric monitoring of the copper-free Sonogashira reaction reveals acceleration by stronger bases and deuterated methanol solvent.