93836-22-7Relevant articles and documents
Mild cu(Otf)2-mediated C-glycosylation with chelation-assisted picolinate as a leaving group
Tang, Weiping,Ye, Wenjing,Stevens, Christopher M.,Wen, Peng,Simmons, Christopher J.
, p. 16218 - 16225 (2021/01/19)
C-Glycosylation reactions of glycosyl picolinates with allyltrimethylsilane or silyl enol ethers were developed. Picolinate as a chelation-assisted leaving group could be activated by Cu(OTf)2 and avoided the use of harsh Lewis acids. The glycosylations were operated under mild neutral conditions and gave the corresponding C-glycosides in up to 95% yield with moderate to excellent stereoselectivities.
Stereocontrolled photocyclization of 1,2-diketones: Application of a 1,3-acetyl group transfer methodology to carbohydrates
Herrera, Antonio J.,Rondon, Maria,Suarez, Ernesto
, p. 3384 - 3391 (2008/09/21)
(Chemical Equation Presented) Photolysis of 1-glycosyl-2,3-butanodione derivatives using visible light is a mild and selective procedure for the synthesis of chiral 1-hydroxy-1-methyl-5-oxaspiro[3.5]nonan-2-one carbohydrate derivatives. The results strongly suggest that stereocontrol of the cyclization is dependent on conformational and stereoelectronic factors. Further oxidative opening of the 1-hydroxy-1-methyl-2-cyclobutanone moiety affords new C-ketoside derivatives either in C- and O-glycoside series. This tandem two-step process could be considered to be a stereocontrol led 1,3-transference of an acetyl group, and it can be applied either to pyranose and furanose models.
Scandium(III) perchlorate (Sc(ClO4)3). A novel catalyst in the α-C- and N-glycosylation reactions
Hachiya,Kobayashi
, p. 3319 - 3320 (2007/10/02)
In the presence of a catalytic amount of scandium(III) perchlorate (Sc(ClO4)3), 1-O-acetyl-2,3,5-tri-O-benzyl-β-D-ribofuranose reacted with trimethylsilylated nucleophiles to afford the corresponding α-D-ribofuranosides in high yield