Mesoionic compounds derived from pyrazole, isothiazole, and isoxazole
作者:Gerhard V. Boyd、Timothy Norris
DOI:10.1039/p19740001028
日期:——
A number of novel mesoioniccompounds related to dehydrodithizone (2,3-diphenyltetrazolium 5-sulphide) have been obtained by deprotonation of 2-methyl-4-methyl-(or 4-p-tolyl-)sulphonylamino-pyrazolium, -isothiazolium and -isoxazolium perchlorates. The pyrazoliumsulphonamidates (9b) and (9c) rearrange to covalent aminopyrazoles on thermolysis; a similar methyl migration occurs when 1,2-dimethyl-3,5-diphenylpyrazolium
The present invention provides a compound represented by the general formula (Ia) or a pharmacologically acceptable salt thereof. In the general formula (Ia), two R moieties each independently represent a C
1-3
alkyl group or the like; and R
1
, R
2
and R
3
each independently represent an optionally substituted linear or branched C
1-4
alkyl group.
QUINOLONE DERIVATIVE OR SALT THEREOF, AND ANTIBACTERIAL CONTAINING THE SAME
申请人:WAKUNAGA SEIYAKU KABUSHIKI KAISHA
公开号:EP0700912A1
公开(公告)日:1996-03-13
A quinolone derivative represented by general formula (1) or a salt thereof, and an antibacterial containing the same, wherein R¹ represents isoxazolyl or isothiazolyl each of which may be substituted; R² represents hydrogen, halogen, lower alkyl, hydroxy, amino or nitro; R³ represents hydrogen or halogen; and Y represents halogen, optionally substituted saturated cyclic amino or H₂N-(CH₂)m-A-. This compound is useful as an antibacterial, can be used as medicines for humans and animals, drugs for fishes, pesticides and food preservative, and is expected to have an anti-HIV activity.