Synthesis and structure–activity relationship of uracil nucleotide derivatives towards the identification of human P2Y 6 receptor antagonists
摘要:
P2Y(6) receptor (P2Y(6)-R) is involved in various physiological and pathophysiological events. With a view to set rules for the design of UDP-based reversible P2Y(6)-R antagonists as potential drugs, we established structure-activity relationship of UDP analogues, bearing modifications at the uracil ring, ribose moiety, and the phosphate chain. For instance, C5-phenyl- or 3-NMe-uridine-5'-alpha,beta-methylene-diphosphonate, 16 and 23, or lack of 2'-OH, in 12-15, resulted in loss of both agonist and antagonist activity toward hP2Y(6)-R. However, uridylyl phosphosulfate, 19, selectively inhibited hP2Y(6)-R (IC50 112 mu M) versus P2Y(2)/(4)-Rs. In summary, we have established a comprehensive SAR for hP2Y(6)-R ligands towards the development of hP2Y(6)-R antagonists. (C) 2015 Elsevier Ltd. All rights reserved.
The first intermolecular interrupted imino-Nazarov reaction: expeditious access to carbocyclic nucleoside analogues
作者:Ronny William、Wei Lin Leng、Siming Wang、Xue-Wei Liu
DOI:10.1039/c5sc03559g
日期:——
Nazarov reaction suffers from unfavorable energetics associated with the ring closure process, thereby limiting the utility of this class of reactions. In this report, the realization of the first intermolecular interrupted imino-Nazarov reaction utilizing silylated pyrimidine derivatives as nucleophilic trapping partners culminated in an expedient synthetic route to carbocyclic nucleoside analogues. The