Productdistributions resulting from the OH-induced oxidation of but-1-ene, 2-methylbut-1-ene, 3-methylbut-1-ene and isoprene in air were measured in the absence of nitrogen oxides and compared with predictions based on currently accepted oxidation mechanisms. In the case of butenes, the observed distributions of carbonyl compounds, hydroxyketones, hydroxyalkanals and diols were evaluated to obtain
Analytical enantiomer separation of aliphatic diols as boronates and acetals by complexation gas chromatography
作者:V. Schurig、D. Wistuba
DOI:10.1016/s0040-4039(01)91399-1
日期:1984.1
Cyclic boronates and acetals of mono- and dialkylsubstituted 1,2-, 2,3- 1,3- & 1,4- diols have been quantitatively separated into enantiomers by complexationgaschromatography utilizing optically active metal chelates. An efficient, precise & sensitive method for determining enantiomeric purities for volatile glycols is thus available.
2,3,5-trisubstituted pyridines as inhibitors of cyclooxygenase-2
申请人:Merck Frosst Canada & Co.
公开号:US06046217A1
公开(公告)日:2000-04-04
The invention encompasses the novel compound of Formula I as well as a method of treating cyclooxygenase-2 mediated diseases comprising administration to a patient in need of such treatment of a non-toxic therapeutically effective amount of a compound of Formula I. ##STR1## The invention also encompasses certain pharmaceutical compositions for treatment of cyclooxygenase-2 mediated diseases comprising compounds of Formula I.