A synthesis of sulfonamide analogs of platensimycin employing a palladium-mediated carbonylation strategy
作者:James McNulty、Jerald J. Nair、Alfredo Capretta
DOI:10.1016/j.tetlet.2009.04.105
日期:2009.7
highly effective in palladium-catalyzedcarbonylative cross-coupling. Aryl and vinyl halides were efficiently converted to carboxylic acids, amides and to primary, secondary, and tertiary esters, respectively. Application of the Pd(OAc)2/PA-Ph (1:1) catalyst system proved critical in the methoxycarbonylation of a functionalized nitroresorcinol halide, allowing convenient access to novel platensimycin
Efficient Carbonylation Reactions in Phosphonium Salt Ionic Liquids: Anionic Effects
作者:James McNulty、Jerald J. Nair、Al Robertson
DOI:10.1021/ol702081g
日期:2007.10.1
Application of phosphoniumsalt ionic liquids in the carbonylation of aryl and vinyl halides is presented. Anionic effects were uncovered with the bromide ionic liquid emerging as the superior media. Acid bromide intermediates were detected in control experiments providing an extended view on the overall catalytic cycle involved. Solvent-free product isolation and recycling of the ionic liquid containing
Substituent Effects on the Electrophilic Activity of Nitroarenes in Reactions with Carbanions
作者:Sylwia Błażej、Mieczysław Mąkosza
DOI:10.1002/chem.200800821
日期:2008.12.8
as a model reaction because it meets key criteria, such as the wide range of substituents that can be present on the nitrobenzene ring, a low sensitivity to steric hindrance, and in particular the possibility of ensuring conditions in which the overall relative rates of reaction in competitive experiments are equal to the relative rates of nucleophilic addition. The values of relative rates of addition
Efficient palladium-catalysed carbonylative and Suzuki–Miyaura cross-coupling reactions with bis(di-tert-butylphosphino)-o-xylene
作者:James McNulty、Jerald J. Nair、Marcin Sliwinski、Al J. Robertson
DOI:10.1016/j.tetlet.2009.02.200
日期:2009.5
use of the ligand bis(di-tert-butylphosphino)-o-xylene (dtbpx) in palladium-catalysed carbonylative and Suzuki–Miyaura cross-couplingreactions is described. Aryl and vinyl halides readily entered into the carbonylative catalytic cycle affording carboxylic acids, amides as well as primary, secondary and tertiary esters, respectively, in good yields. Aryl iodides, bromides and chlorides gave high yields