1397293-76-3Relevant academic research and scientific papers
Phosphorus-carbon bond formation: Palladium-catalyzed cross-coupling of H-phosphinates and other P(O)H-containing compounds
Berger, Olivier,Petit, Christelle,Deal, Eric L.,Montchamp, Jean-Luc
supporting information, p. 1361 - 1373 (2013/06/26)
Two generally applicable systems have been developed for the cross-coupling of P(O)H compounds with Csp2-X and related partners. Palladium catalysis using a ligand/additive combination, typically either xantphos/ethylene glycol or 1,1-bis(diphenylphosphino)ferrocene/1,2- dimethoxyethane, with diisopropylethylamine as the base, proved to be generally useful for the synthesis of numerous P-C containing compounds. Routinely, 2 mol% of catalyst are employed (less than half the amount typically employed in most other literature reports). In most cases, excellent results are obtained with a variety of electrophiles (RX, where R=alkenyl, allyl, alkynyl, etc.). The full account of our studies is disclosed, including tandem hydrophosphinylation/ coupling and coupling/coupling for doubly catalytic phosphorus-carbon bond formation. The methodology compares favorably with any existing literature report. The use of an additive appears to be a generally useful strategy to control the reactivity of phosphinylidene compounds. Copyright
DBU-promoted alkylation of alkyl phosphinates and H-phosphonates
Gavara, Laurent,Petit, Christelle,Montchamp, Jean-Luc
supporting information, p. 5000 - 5003 (2012/11/07)
The alkylation of alkyl phosphinates and some H-phosphonate diesters is promoted by the base DBU. Only more reactive alkyl halides react in preparatively useful yields. However, the method provides easy access to important H-phosphinate building blocks, without the need for a protecting group strategy or metal catalysts. The reaction is conveniently conducted at, or below, room temperature. The preparation of methyl-H-phosphinate esters is particularly interesting as it avoids the heretofore more common use of methyldichlorophosphine MePCl2.
