58479-62-2Relevant articles and documents
Synthesis of amphiphilic A3B mikto-arm copolymers from a sugar core: Combination of hydrophobic PCL and hydrophilic glycopolymers for biocompatible nanovector preparation
Suriano, Fabian,Coulembier, Olivier,Dubois, Philippe
, p. 3271 - 3280 (2010)
Amphiphilic A3B mikto-arm copolymers have been synthesized using a t-butyl-diphenyl silyl-based methylglucoside derivative. The latter has been first used as initiator for the polymerization of ε-caprolacto ne leading to three-arm starshaped st
Application of ball milling technology to carbohydrate reactions: I. Regioselective primary hydroxyl protection of hexosides and nucleoside by planetary ball milling
Patil, Premanand Ramrao,Kartha, K.P. Ravindranathan
, p. 279 - 293 (2008/12/21)
Dry ball milling of hexosides with trityl chloride in the presence of DABCO or Na2CO3 has been found to result in their complete conversion to the respective 6-O-trityl ethers. Further wet grinding of the reaction mixture with Ac2O in the presence of DMAP led to the respective fully protected hexosides in good to excellent yields after isolation. It has been found to be an effective one-pot two-step synthesis under solvent-free condition. The speed of homogenization has been shown to highly influence the rate and outcome of the reaction, and commercially available planetary ball mill has been proved to be very convenient for carrying out the reaction under standardized and reproducible conditions.
Imidazole-promoted 1,4-migration of the tert-butyldiphenylsilyl group: Influence on the selectivity control of the silylation reactions of carbohydrate OH groups
Arias-Perez, Maria Selma,Lopez, Maria Soledad,Santos, Maria Jesus
, p. 1549 - 1552 (2007/10/03)
The regioselective protection of secondary hydroxy groups of gluco-, galacto-, manno-, rhamno- and fucopyranosides using TBDPSCl with imidazole in DMF has been studied. It was found that the relative spatial arrangement of the OH groups modulates the silylation selectivity which arises from the combination of kinetic factors and the intramolecular migrations of the secondary TBDPS groups. The rearrangement of the TBDPS groups has a much larger effect on the α-D-manno- and α-L-rhamnopyranosides, allowing the protection of the OH groups at positions 2, 3 or 2 and 4, in synthetically useful yields, by changing the reaction conditions. The relative reactivity of the secondary OH groups seems particularly likely to be governed by steric factors. This trend provides a valuable approach to the synthesis of 3-O-tert-butyldiphenylsilyl-1-thio-β-L-fucopyranoside.