The imidazolium compounds of the formula ##STR1## wherein the various substituents are defined hereinbelow and their pharmaceutically acceptable acid addition salts, which possess valuable pharmacological properties are described. In particular, they possess antibacterial, antimycotic, protozoacidal and/or anthelmintic properties and are especially active against parasitic protozoa and worms. The compounds of formula I can be prepared according to known methods.
NEAR INFRARED FLUOROGEN AND FLUORESCENT ACTIVATING PROTEINS FOR IN VIVO IMAGING AND LIVE-CELL BIOSENSING
申请人:Carnegie Mellon University
公开号:US20140243509A1
公开(公告)日:2014-08-28
Tissue slices and whole organisms offer substantial challenges to fluorescence imaging. Autofluorescence and absorption via intrinsic chromophores, such as flavins, melanin, and hemoglobins, confound and degrade output from all fluorescent tags. An “optical window,” farther red than most autofluorescence sources and in a region of low hemoglobin and water absorbance, lies between 650 and 900 nm. This valley of relative optical clarity is an attractive target for fluorescence-based studies within tissues, intact organs, and living organisms. Novel fluorescent tags were developed herein, based upon a genetically targeted fluorogen activating protein and cognate fluorogenic dye that yields emission with a peak at 733 nm exclusively when complexed as a “fluoromodule”. This tool improves substantially over previously described far-red/NIR fluorescent proteins in terms of brightness, wavelength, and flexibility by leveraging the flexibility of synthetic chemistry to produce novel chromophores.
Process for 4-dimethylamino-3,5-dimethoxybenzaldehyde
申请人:Hoffman-La Roche Inc.
公开号:US04900859A1
公开(公告)日:1990-02-13
4-Dimethylamino-3,5-dimethoxy-benzaldehyde, an intermediate for the preparation of the antibacterially active aditoprim (4-dimethylamino-3,5-dimethoxybenzoldehyde) a known antibacterially active compound, is obtained from 4-dimethylaminobenzonitrile by bromination or chlorination, replacement of the halogen by the methoxy group and reduction of the nitrile group.
Die neuen Verbindungen der Formel
worin R¹ und R³ nieder-Alkoxy oder nieder-Alkylthio; R² nieder-Alkoxy, Hydroxy oder Amino; und R⁴ Wasserstoff; oder R¹ und R² nieder-Alkoxy, R³ Wasserstoff und R⁴ nieder-Alkyl bedeuten,
sind Zwischenprodukte bei der Herstellung von Benzylpyrimidinen. Man erhält die Verbindungen I durch Umsetzung eines durch R¹-R⁴ entsprechend substituierten Benzols mit Alloxan.