620946-66-9Relevant academic research and scientific papers
Regiospecific formation of sugar-derived ketonitrone towards unconventional: C -branched pyrrolizidines and indolizidines
Massicot, Fabien,Messire, Gatien,Vallée, Alexis,Vasse, Jean-Luc,Py, Sandrine,Behr, Jean-Bernard
, p. 7066 - 7077 (2019)
The synthesis of unprecedented branched pyrrolizidines and indolizidines was accomplished via nitrone chemistry. The required ketonitrone, a known intermediate usually obtained as a mixture of regioisomers, was prepared in a pure form from d-arabinose by
A convenient approach toward the synthesis of enantiopure isomers of DMDP and ADMDP
Tsou, En-Lun,Yeh, Yao-Ting,Liang, Pi-Hui,Cheng, Wei-Chieh
experimental part, p. 93 - 100 (2009/04/07)
A practical method for the synthesis of five-membered iminocyclitols, pyrrolidine alkaloids bearing multiple hydroxyl substituents, has been developed. All of the eight key intermediates, enantiopure tri-O-benzyl cyclic nitrones, are prepared from four cheap, readily available d-aldopentoses. The nucleophilic addition of cyclic nitrones with vinyl magnesium chloride and TMSCN shows high 2,3-trans stereoselectivity. To construct the 2,3-cis configurations, inversion of the C-2 nitrile group is achieved via an elimination-reduction sequence. Using this approach, five isomers of DMDP and six isomers of ADMDP are prepared efficiently. In the biological evaluation, iminocyclitol 27 is a new and potent inhibitor against β-hexosaminidase with an IC50 value of 0.2 μM.
Synthetic access to the first spirocyclopropyl iminosugar
Laroche, Christophe,Plantier-Royon, Richard,Szymoniak, Jan,Bertus, Philippe,Behr, Jean-Bernard
, p. 223 - 226 (2007/10/03)
The synthesis of the first spirocyclopropyl iminosugar has been achieved in six steps and 13% overall yield from commercially available 2,3,5-tri-O-benzyl-D-arabinose. The synthesis is based on an efficient two-step reaction involving the titanium-mediate
One-pot synthesis of cyclic nitrones and their conversion to pyrrolizidines: 7a-epi-crotanecine inhibits α-mannosidases
Cicchi,Marradi,Vogel,Goti
, p. 1614 - 1619 (2007/10/03)
A new straightforward and inexpensive one-pot procedure is described for the preparation of enantiopure five-membered cyclic nitrones starting from the corresponding lactols. Its efficiency relies on the condensation of unprotected hydroxylamine with read
Spirocyclopropyl pyrrolidines as a new series of α-l-fucosidase inhibitors
Laroche, Christophe,Behr, Jean-Bernard,Szymoniak, Jan,Bertus, Philippe,Schuetz, Catherine,Vogel, Pierre,Plantier-Royon, Richard
, p. 4047 - 4054 (2007/10/03)
Polyhydroxy 4-azaspiro[2.4]heptane derivatives (spirocyclopropyl iminosugars) were prepared in four to six steps from readily available protected aldoses. The key step of the reaction sequence involves a titanium-mediated aminocyclopropanation of glyconon
Synthesis and glycosidase inhibitory activity of 7-deoxycasuarine
Carmona, Ana T.,Whigtman, Richard H.,Robina, Inmaculada,Vogel, Pierre
, p. 3066 - 3073 (2007/10/03)
Reaction of 1,4-anhydro-2,3,5-tri-O-benzyl-1-deoxy-1-imino-D-arabinitol N-oxide (8) with allyl alcohol produced a 3.6:1 mixture of the two pyrrolo[1,2-b]isoxazole derivatives 13 and 14. The major adduct 13 was converted to 7-deoxycasuarine (7), a potent,
Potential Glycosidase Inhibitors: Synthesis of 1,4-Dideoxy-1,4-imino Derivatives of D-Glucitol, D- and L-Xylitol, D- and L-Allitol, D- and L-Talitol, and D-Gulitol
Buchanan, J. Grant,Lumbard, Keith W.,Sturgeon, Robert J.,Thompson, Deryk K.
, p. 699 - 706 (2007/10/02)
Conversion of 2,3,5,6-tetra-O-benzyl-D-galactofuranose (19) into its oxime and subsequent treatment with methanesulphonyl chloride gave 2,3,5,6-tetra-O-benzyl-4-O-methylsulphonyl-D-galactonitrile (21).Reductive cyclization by sodium borohydride/cobalt(II)
89. Deoxy-nitrosugars. 10th Communication. Synthesis of Isosteric Phosphonate Analogues of Ulose-1-Phosphates
Julina, Radomir,Vasella, Andrea
, p. 819 - 830 (2007/10/02)
A general approach to isosteric phosphonate analogues of ulose-1-phosphates is described.A base-catalysed chain elongation via a Michael addition of 1-deoxy-1-nitro-sugars 4, 8, and 16 to the vinylphosphonate 18 followed by hydrolysis of the nitro adducts
