An original and efficient palladium-catalyzed amination of imidazo[2,1-b][1,3,4]thiadiazole is reported. The SNAr and Buchwald–Hartwig cross-coupling reactions were investigated to access C-2 aminated imidazo[1,2-b][1,3,4]thiadiazole derivatives. The reaction conditions were optimized under microwave irradiation, and a wide range of amines were used to determine the scope and limitations of the method
Identification of the minimum PAR4 inhibitor pharmacophore and optimization of a series of 2-methoxy-6-arylimidazo[2,1- b ][1,3,4]thiadiazoles
作者:Kayla J. Temple、Matthew T. Duvernay、Jae G. Maeng、Anna L. Blobaum、Shaun R. Stauffer、Heidi E. Hamm、Craig W. Lindsley
DOI:10.1016/j.bmcl.2016.10.020
日期:2016.11
This letter describes the further deconstruction of the known PAR4 inhibitor chemotypes (MWs 490-525 and with high plasma protein binding) to identify a minimum PAR4 pharmacophore devoid of metabolic liabilities and improved properties. This exercise identified a greatly simplified 2-methoxy-6-arylimidazo [2,1-b][1,3,4]thiadiazole scaffold that afforded nanomolar inhibition of both activating peptide and gamma-thrombin mediated PAR4 stimulation, while reducing both molecular weight and the number of hydrogen bond donors/acceptors by similar to 50%. This minimum PAR4 pharmacophore, with competitive inhibition, versus non-competitive of the larger chemotypes, allows an ideal starting point to incorporate desired functional groups to engender optimal DMPK properties towards a preclinical candidate. (C) 2016 Elsevier Ltd. All rights reserved.
POLYMERIZABLE COMPOUND AND OPTICALLY ANISOTROPIC OBJECT
申请人:DIC CORPORATION
公开号:US20170369783A1
公开(公告)日:2017-12-28
The present invention aims to provide a polymerizable compound that has high storage stability without causing crystal precipitation when added to a polymerizable composition and to provide a polymerizable composition containing the polymerizable compound. A polymer film produced by polymerization of the polymerizable composition has a low haze, high thickness uniformity, low occurrence of nonuniform orientation, high surface hardness, high adhesiveness, and good appearances and fewer orientation defects even after ultraviolet irradiation. The present invention also aims to provide a polymer produced by polymerization of the polymerizable composition and an optically anisotropic body produced from the polymer.