Charge Transport and Quantum Interference Effects in Oxazole-Terminated Conjugated Oligomers
作者:Songsong Li、Hao Yu、Kenneth Schwieter、Kejia Chen、Bo Li、Yun Liu、Jeffrey S. Moore、Charles M. Schroeder
DOI:10.1021/jacs.9b08427
日期:2019.10.9
anchor group to form stable gold-molecule-gold junctions. We further observe quantuminterference (QI) effects in oxazole-terminated phenylene molecular junctions, including destructive QI in meta-substituted phenyl rings and constructive QI in para-substituted phenyl rings containing terminal oxazole groups with the same chemical constitution on both termini (i.e. O5O5 (5-oxazolyl) or O4O4 (4-oxazolyl)
The present invention relates to triaryl-oxy-aryl-spiro-pyrimidine-2,4,6-trione metalloproteinase inhibitors of the formula
1
wherein said ring X is a 5-7 membered heterocyclic ring, and wherein A, Y, B, G, and W are as defined in the specification; and to pharmaceutical compositions and methods of treating inflammation, cancer and other disorders.
Rhodium-Catalyzed 2-Methylthiolation Reaction of Thiazoles/Oxazoles Using 2-(Methylthio)thiazole
作者:Mieko Arisawa、Masahiko Yamaguchi、Yuri Nihei
DOI:10.3987/com-14-s(k)59
日期:——
RhH(PPh3)(4) and 1,3-bis(dicyclohexyl)phosphinopropane (dcypp) catalyze the 2-methylthiolation of oxazoles and thiazoles using 2-(methylthio)thiazole as a thiolating reagent. The methylthio transfer reaction is under equilibrium, and various 2-methylthiolated thiazoles and oxazoles were obtained in moderate to good yields by removing thiazole under refluxing o-dichlorobenzene.
Potent, selective spiropyrrolidine pyrimidinetrione inhibitors of MMP-13
作者:Kevin D. Freeman-Cook、Lawrence A. Reiter、Mark C. Noe、Amy S. Antipas、Dennis E. Danley、Kaushik Datta、James T. Downs、Shane Eisenbeis、James D. Eskra、David J. Garmene、Elaine M. Greer、Richard J. Griffiths、Roberto Guzman、Joel R. Hardink、Fouad Janat、Christopher S. Jones、Gary J. Martinelli、Peter G. Mitchell、Ellen R. Laird、Jennifer L. Liras、Lori L. Lopresti-Morrow、Jayvardhan Pandit、Usa D. Reilly、Donald Robertson、Marcie L. Vaughn-Bowser、Lilli A. Wolf-Gouviea、Sue A. Yocum
DOI:10.1016/j.bmcl.2007.09.085
日期:2007.12
Explorations in the pyrimidinetrione series of MMP-13 inhibitors led to the discovery of a series of spiro-fused compounds that are potent and selective inhibitiors of MMP-13. While other spiro-fused motifs are hydrolytically unstable, presumably due to electronic destabilization of the pyrimidinetrione ring, the spiropyrrolidine series does not share this liability. Greater than 100-fold selectivity versus other MMP family members was achieved by incorporation of an extended aryl-heteroaryl P1' group. When dosed as the sodium salt, these compounds displayed excellent oral absorption and pharmacokinetic properties. Despite the selectivity, a representative of this series produced fibroplasia in a 14 day rat study. (c) 2007 Elsevier Ltd. All rights reserved.