An efficient method for the phosphonation of C=X compounds
作者:A. O. Kolodyazhnaya、O. O. Kolodyazhnaya、O. I. Kolodyazhnyi
DOI:10.1134/s1070363210040055
日期:2010.4
(aldehydes, ketones, ketophosphonates, aldimines, ketimines, isocyanates, isothiocyanates, and activated olefins) in the presence of amines and anilines hydrohalides was studied. We found that pyridine hydrohalides effectively activate the reaction of tralkyl phosphites with various C=X electrophiles: aldehydes, ketones, ketophosphonates, aldimines, ketimines, isocyanates, isothiocyanates, and activated
Reactions of acyl tributylphosphonium chlorides and dialkyl acylphosphonates with Grignard and organolithium reagents
作者:Hatsuo Maeda、Kenji Takahashi、Hidenobu Ohmori
DOI:10.1016/s0040-4020(98)00767-4
日期:1998.10
Ketones and esters (4) were effectively prepared by reaction of Grignard reagents with acyl tributylphosphonium chlorides (2), diethyl acylphosphonates (5), or diisopropyl acylphosphonate (6) derived from acid chlorides and chloroformates (1). Although by the method with 2, 4 is prepared in one-pot operation from 1 and generally in a higher yield, the method with 5 or 6 proved to compensate for the
<i>O</i>-Allylated Pudovik and Passerini Adducts as Versatile Scaffolds for Product Diversification
作者:Mansour Dolé Kerim、Tania Katsina、Martin Cattoen、Nicolas Fincias、Stellios Arseniyadis、Laurent El Kaïm
DOI:10.1021/acs.joc.0c01721
日期:2020.10.2
The palladium-catalyzed O-allylation of α-hydroxyphosphonates and α-hydroxyamides obtained from Pudovik and Passerini multicomponent reactions has allowed interesting and highly straightforward access to a variety of building blocks for product diversification. These post-functionalizations include a selective base- or ruthenium hydride-mediated isomerization/Claisen rearrangement cascade and a ring-closing
Palladium-catalysed<i>O</i>-Allylation of α-Hydroxyphosphonates: An Expedient Entry into Phosphono-oxaheterocycles
作者:Mansour Dolé Kerim、Martin Cattoen、Nicolas Fincias、Aurélie Dos Santos、Stellios Arseniyadis、Laurent El Kaïm
DOI:10.1002/adsc.201701150
日期:2018.2.1
We report here an unprecedented palladium-catalysed O-allylation of α-hydroxyphosphonates. The method was eventually included in a sequential Pudovik/Tsuji-Trost type O-allylation/Ring-Closing Metathesis to afford a variety of phosphorylated heterocycles of various sizes ranging from 5 to 16 starting from readily available aldehydes.
Highly Effective Alkaline Earth Catalysts for the Sterically Governed Hydrophosphonylation of Aldehydes and Nonactivated Ketones
作者:Bo Liu、Jean-François Carpentier、Yann Sarazin
DOI:10.1002/chem.201201489
日期:2012.10.15
Down‐to‐earth catalysis: Heteroleptic and, more interestingly, homoleptic complexes of the large alkalineearth metals (calcium, strontium, and barium) constitute remarkably efficient catalysts for hydrophosphonylation reactions of aldehydes and nonactivatedketones (see scheme). Perfect chemoselectivities and unprecedented turnover frequencies (TOFs) are reported.