Reaction of chloromethyliso(thio)cyanato(thio)phosphonates(-phosphinates) with phenol, ethanol, and thiols
作者:N. A. Khailova、R. Kh. Bagautdinova、A. A. Shaimardanova、N. E. Krepysheva、M. A. Pudovik、G. A. Chmutova、N. M. Azancheev、R. Z. Musin、A. N. Pudovik
DOI:10.1007/s11176-005-0006-7
日期:2004.9
(Chloromethyl)isocyanatophosphonates(-phosphinates) take up phenol to form carbamates whose β-cleavage gives rise to phenyl (chloromethyl)phosphonates(-phosphinates). (Chloromethyl)(thio)phosphinic-(phosphonic) isothiocyanates react with phenol at 20°C in the absence of catalyst to afford phenyl phosphinates(-phosphonates). (Alkylsulfanyl)carbamates formed by addition of thiols to (chloromethyl)iso(thio)cyanastophosphonates(-phosphinates) under the action of an equimolar amount of triethylamine undergo cyclization into 1,3,4-oxaza(thiaza)phospholines.
[(Diphenoxyphosphinyl)methylidene]triphenylphosphorane—the double P+-stabilised carbanion: a crystallographic, computational and solution NMR comparative study on the ylidic bonding
作者:Lilianna Chęcińska、Zbigniew H. Kudzin、Magdalena Małecka、Ryszard B. Nazarski、Andrzej Okruszek
DOI:10.1016/j.tet.2003.08.008
日期:2003.9
The crystal and molecular structure of the title compound (1) was established by an X-ray diffraction analysis. Some geometrical parameters including a slightly pyramidal shape around its ylidic Cβ-atom were determined (trans-bent type conformation), providing evidence for a strong electron delocalisation in the PαCβPγOδ backbone. The charge density redistribution within this molecular unit and its
Synthesis of certain nucleoside methylenediphosphonate sugars as potential inhibitors of glycosyltransferases
作者:Morteza M. Vaghefi、Ralph J. Bernacki、William J. Hennen、Roland K. Robins
DOI:10.1021/jm00391a021
日期:1987.8
The synthesis of alpha-D-glucopyranosyl 1-(methylenediphosphonate) (11), alpha-D-galactopyranosyl 1-(methylenediphosphonate) (14), and alpha-D-mannopyranosyl 1-(methylenediphosphonate) (17) has been accomplished. [(Di-phenoxyphosphinyl)methyl]phosphonic acid (diphenyl-MDP) (5), synthesized by two different procedures, was fused with beta-D-glucopyranose pentaacetate followed by catalytic hydrogenation to give 2,3,4,6-tetra-O-acetyl-alpha-D-glucopyranosyl methylenediphosphonate (glucose-MDP) (10). The anomeric configuration of 10 was assigned on the basis of NMR spectral studies. Condensation of 10 with 2',3'-di-O-acetyladenosine was accomplished by using 1-(mesitylene-2-sulfonyl)-3-nitro-1,2,4-triazole (MSNT) as coupling agent, and removal of the blocking groups gave adenosine 5'-[(alpha-D-glucopyranosylhydroxyphosphinyl)methyl]phosphonate (20). Uridine 5'-[(alpha-D-galactopyranosylhydroxyphosphinyl)methyl] phosphonate (23) and guanosine 5'-[(alpha-D-mannopyranosylhydroxyphosphinyl)methyl]phosphonate (26) were similarly prepared. Using a specific glycoprotein galactosyltransferase (EC 2.4.1.38) assay, uridine 5'-[(alpha-D-galactopyranosylhydroxyphosphinyl)methyl]phosphonate (23) demonstrated competitive inhibition with an apparent Ki of 97 microM. The adenosine analogue did not inhibit the enzyme. None of the above compounds show any in vitro antitumor or antiviral activity. Such specific inhibitors of glycosyltransferases may serve as specific probes to study various glycosyltransferases that might be involved in the process of metastasis.
Cabioch, Jean-Luc; Pellerin, Bruno; Denis, Jean-Marc, Phosphorus, Sulfur and Silicon and the Related Elements, 1989, vol. 44, p. 27 - 32