aromatic nitration with carboxylic anhydride-inorganic nitrate as the nitrating agent. In the presence of a catalytic amount of RE(OTf)3, the nitration of substituted benzenes proceeded to afford the corresponding nitrobenzenes. Especially, scandium(III) trifluoromethanesulfonate (scandium(III) triflate, Sc(OTf)3) is the most active catalyst among our tested Lewis acids. It was also found that acetic anhydride-Al(NO3)
Potent, selective human β3 adrenergic receptor agonists containing a substituted indoline-5-sulfonamide pharmacophore
作者:Robert J Mathvink、Anna Maria Barritta、Mari R Candelore、Margaret A Cascieri、Liping Deng、Laurie Tota、Catherine D Strader、Matthew J Wyvratt、Michael H Fisher、Ann E Weber
DOI:10.1016/s0960-894x(99)00277-2
日期:1999.7
A series of compounds possessing an N-substituted indoline-5-sulfonamide pharmacophore was prepared and evaluated for their human beta(3) adrenergic receptor agonist activity. The SAR of a wide range of urea and heterocyclic substituents is discussed. 4-Octyl thiazole compound 8c was the most potent and selective compound in the series, with 2800-fold selectivity over beta(1) binding and 1400-fold selectivity over beta(2) binding (C) 1999 Elsevier Science Ltd. All rights reserved.
BARBA N. A.; POGREBNOJ I. L.; SHUKLA R. K., REDKOLLEGIYA ZH. IZV. VYSSH UCHEB.
作者:BARBA N. A.、 POGREBNOJ I. L.、 SHUKLA R. K.
DOI:——
日期:——
Color forming compositions and associated methods
申请人:Bhatt Jayprakash C.
公开号:US20070269737A1
公开(公告)日:2007-11-22
Compositions and methods for forming color images on a substrate capable of development at desired wavelengths or energy levels are disclosed and described. The color forming composition can include a carrier system and a latent pigment with a pendent group, wherein the latent pigment is colorless or pale in color while the pendent group is attached, and wherein the latent pigment is convertible to a colored pigment upon removal of the pendent group. Alternatively, the latent pigment can have multiple states of conjugation where the latent pigment is colorless or pale in a first conjugation state, and colored in a second conjugation state. The color forming compositions are useful in forming images on a wide variety of substrates, such as optical disks.