Bicyclic carbohydrate-derived scaffolds for combinatorial libraries
摘要:
A bicyclic scaffold derived from the natural monosaccharide D-glucose, and possessing several diversity sites, was linked to various resins through the primary (C-6) hydroxyl and decorated on the solid phase: the hydroxyl group at C-4 was functionalized as ester, ether, and carbamate, the amino group ill the second cycle (C-3' position) was functionalized as amide, sulfonamide, and ureido- and thioureido-derivatives. The compounds synthesized oil the solid phase were tested for their antiproliferative activity oil tumor cell lines. (c) 2006 Elsevier Ltd. All rights reserved.
Bicyclic carbohydrate-derived scaffolds for combinatorial libraries
摘要:
A bicyclic scaffold derived from the natural monosaccharide D-glucose, and possessing several diversity sites, was linked to various resins through the primary (C-6) hydroxyl and decorated on the solid phase: the hydroxyl group at C-4 was functionalized as ester, ether, and carbamate, the amino group ill the second cycle (C-3' position) was functionalized as amide, sulfonamide, and ureido- and thioureido-derivatives. The compounds synthesized oil the solid phase were tested for their antiproliferative activity oil tumor cell lines. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of 7-Oxabicyclo[2.2.1]heptanes and 8-Oxabicyclo[3.2.1]octanes from C-Glycosides via an Intramolecular Cyclization
作者:Wei Zou、Kannan Vembaiyan
DOI:10.1021/jo3024973
日期:2013.3.15
A simple and effective method for the synthesis of 7-oxabicyclo[2.2.1]heptanes and 8-oxabicyclo[3.2.1]octanes from acetonyl C-glycoside substrates is described, which involves an intramolecular cyclization reaction through a nucleophilic substitution at C-5 or C-6 of C-glycosides by a 2′-enamine intermediate formed in the presence of pyrrolidine. Because anomeric epimerization occurs under these conditions