16115-01-8Relevant articles and documents
Synthesis of α-hydroxy-methylenebisphos-phonates by the microwave-assisted reaction of α-oxophosphonates and dialkyl phosphites under solvent ess conditions
Gruen, Alajos,Molnar, Istvan Gabor,Bertok, Bela,Greiner, Istvan,Keglevich, Gyoergy
, p. 350 - 354 (2009)
The synthesis of hydroxy-methyl-enebisphosphonates (2a-c) by the addition of dialkyl phosphite to the carbonyl group of the corresponding α-oxophosphonate (1a-c) was studied under microwave irradiation (MW) and solventless conditions in the presence of di
Darzens reaction of acyl phosphonates with α-bromo ketones: Selective synthesis of cis- and trans-epoxyphosphonates
Demir, Ayhan S.,Emrullahoglu, Mustafa,Pirkin, Eser,Akca, Nazmiye
scheme or table, p. 8992 - 8997 (2009/04/06)
(Chemical Equation Presented) Acyl phosphonates with α-halo ketones in the presence of bases at room temperature afford cis- and trans-epoxyphosphonates in good chemical yields and high selectivities using different bases. The diastereoselectivity of this reaction is easily controlled by changing the base. Changing the base from Cs2CO3 to DBU changed the diastereomeric ratio (transieis) from 3/2 to 9/1. Moreover, the treatment of the trans isomer with DBU showed a complete conversion to the corresponding cis isomer.
α CETOPHOSPHONATES ET ESTERS CYCLIQUES D'HYDROXYMETHYLENES DIPHOSPHONATES SYNTHESES, STRUCTURES ET HYDROLYSE
Tromelin, Anne,El Manouni, Driss,Burgada, R.
, p. 301 - 312 (2007/10/02)
Synthesis of symmetrical diesters derived from hydroxy methylene diphosphonic acids 1 to 8 is described either in one step or via the corresponding α ketophosphonate 1a to 8a.Study of the diphosphonates (1 to 6) -> phosphate-phosphonates (1b to 6b) isomerization has been realized.Results related to peculiar cases in connection with nonsymmetrical esters 10, 11, 17 and study of the hydrolysis reaction of diphosphonates are presented.