Acyclic Analogues of Adenosine Bisphosphates as P2Y Receptor Antagonists: Phosphate Substitution Leads to Multiple Pathways of Inhibition of Platelet Aggregation
作者:Bin Xu、Andrew Stephens、Gary Kirschenheuter、Arthur F. Greslin、Xiaoquin Cheng、Joe Sennelo、Marco Cattaneo、Maddalena L. Zighetti、Aishe Chen、Soon-Ai Kim、Hak Sung Kim、Norbert Bischofberger、Gary Cook、Kenneth A. Jacobson
DOI:10.1021/jm020173u
日期:2002.12.1
aggregation, and antagonists at these receptor subtypes have antithrombotic properties. In an earlier publication, we have characterized the SAR as P2Y(1) receptor antagonists of acyclic analogues of adeninenucleotides, containing two phosphate groups on a symmetrically branched aliphatic chain, attached at the 9-position of adenine. In this study, we have focused on antiaggregatory effects of P2Y antagonists
Acyclic and Cyclopropyl Analogues of Adenosine Bisphosphate Antagonists of the P2Y<sub>1</sub> Receptor: Structure−Activity Relationships and Receptor Docking
作者:Hak Sung Kim、Dov Barak、T. Kendall Harden、José L. Boyer、Kenneth A. Jacobson
DOI:10.1021/jm010082h
日期:2001.9.1
to platelet aggregation, and selective antagonists are sought as potential antithrombotic agents. We reported (Kim et al. J. Med. Chem. 2000, 43, 746-755) that acyclic analogues of adenine nucleotides, containing two phosphate groups on a symmetrically branched aliphatic chain, attached at the 9-position of adenine, are moderately potent P2Y1 receptor antagonists. In this study we have varied the chain
血小板中 P2Y1 受体的激活有助于血小板聚集,因此寻求选择性拮抗剂作为潜在的抗血栓剂。我们报道 (Kim et al. J. Med. Chem. 2000, 43, 746-755) 腺嘌呤核苷酸的无环类似物,在对称支链脂肪链上含有两个磷酸基团,连接在腺嘌呤的 9 位强效 P2Y1 受体拮抗剂。在这项研究中,我们改变了链结构,包括不对称取代、烯属和环丙基。这些拮抗剂在微摩尔范围内抑制由 30 nM 2-MeS-ADP 诱导的火鸡红细胞膜中的磷脂酶 C 的刺激。在被两个磷酸基团取代的一系列对称支化脂肪族基团中,最佳拮抗剂效力发生在 2-甲基丙基基团。2-氯-N(6)-甲基腺嘌呤衍生物,2-[2-(2-chloro-6-methylaminopurin-9-yl)methyl]propane-1,3-bisoxy(diammoniumphosphate) (7),是一个完整的P2Y1 受体拮抗剂,IC(50)
Synthesis of bicyclic lactones via I2-mediated intramolecular tandem C–C/C–O bond formation
The iodine/DMAP-mediated intramoleculartandem C–C/C–O bond forming reaction of malonate bearing alkene moiety proceeded to give bicyclic lactones with good diastereoselectivity in good yield. The mechanistic investigation was also discussed on the basis of various control experimental results.
New 1,6-heptadienes with pyrimidine bases attached: Syntheses and spectroscopic analyses
作者:Hassan H. Hammud、Amer M. Ghannoum、Fares A. Fares、Lara K. Abramian、Kamal H. Bouhadir
DOI:10.1016/j.molstruc.2007.08.026
日期:2008.6
Abstract A simple, high yielding synthesis leading to the functionalization of some pyrimidine bases with a 1,6-heptadienyl moiety spaced from the N − 1 position by a methylene group is described. A key step in this synthesis involves a Mitsunobu reaction by coupling 3N-benzoyluracil and 3N-benzoylthymine to 2-allyl-pent-4-en-1-ol followed by alkaline hydrolysis of the 3N-benzoyl protecting groups
8-Endo Cyclization of (Alkoxycarbonyl)methyl Radicals: Radical Ways for Preparation of Eight-Membered-Ring Lactones
作者:Eun Lee、Cheol Hwan Yoon、Tae Hee Lee、Sun Young Kim、Tae Joon Ha、Yong-suk Sung、Sang-Hyun Park、Sangyoub Lee
DOI:10.1021/ja980908d
日期:1998.8.1
Cyclization of (alkoxycarbonyl)methyl radicals generated from bromoacetates proceeds in the 8-endo mode to generate heptanolactones. Three distinct types of 8-endo/5-exo tandem radical cyclizations produce different bicyclic heptanolactones. In certain cases, intramolecularfree-radical attack on the heptanolactone carbonyl group initiates further skeletal rearrangement. Ab initio calculations indicate