Macrocyclic peptides are disclosed having the general formula:
wherein R′, R
3
, R
3′
, R
4
, R
6
, X, Q, and W are described. Compositions comprising the compounds and methods for using the compounds to inhibit HCV are also disclosed.
A visible-light-induced photoredoxMiniscialkylation reaction of N-heteroarenes with ethyl acetate has been reported. The low-toxic ethyl acetate was used for the first time as an alkylation reagent. Hence, 4-quinazolinones, quinolines and pyridines reacted smoothly in the current reaction system. Mechanistic studies indicate that LiBr plays a key role to dramatically improve the efficiency of the
The present invention relates to electronic devices, in particular organic electroluminescent devices, comprising metal complexes of the formula (1), and to the preferred metal complexes.
本发明涉及电子设备,特别是有机电致发光器件,包括具有式(1)的金属配合物,以及优选的金属配合物。
Synthesis of Substituted Pyridines by a Cycloaddition Route Using Nitrile Oxides and Homoallyl Alcohols
作者:Shuji Kanemasa、Yoshihiko Asai、Junji Tanaka
DOI:10.1246/bcsj.64.375
日期:1991.2
Cycloadditions of nitrile oxides with unprotected homoallyl alcohols, followed by Swern oxidations, lead to 5-(2-oxoalkyl)-2-isoxazolines. Subsequent Raney Ni reduction of the resulting heterocycles in ethanol in the presence of excess tetrafluoroboric acid affords substituted pyridine derivatives.
腈氧化物与未保护的高烯丙醇的环加成,然后是 Swern 氧化,产生 5-(2-氧代烷基)-2-异恶唑啉。随后在过量四氟硼酸存在下,在乙醇中对所得杂环进行 Raney Ni 还原,得到取代的吡啶衍生物。
Thermal characterization of the solid state and raw material fluconazole by thermal analysis and pyrolysis coupled to GC/MS
This article had studied the thermal characterization of the raw material and different fluconazole crystals, obtained through recrystallization with different solvents using thermoanalytical techniques (TG, DTA, DSC-50, DSC Photovisual, DSC-60) and Pyr-GC/MS. The results confirmed that the fluconazole volatilizes without decomposition until 250 °C. Pyr-GC/MS showed hexachlorobenzene like impurities in fluconazole raw material.