We present the synthesis of 1-thioglycosyl derivatives of uridine. which were designed to act as potential donor substrates for glycosyltransferases. We constructed such analogs using 5-amino-2-pyridyl 1-thioglycosides as glycosyl units which were connected to uridine via succinic linker. For preparation of the amide bonds we applied different condensation procedures. (C) 2009 Elsevier Inc. All rights reserved.