New Synthesis of Known Herbicides Based on Aryloxyalkanoic Acids
摘要:
A new version has been proposed for the synthesis of analogs of the known herbicides mecoprop (MCPP) and dichlorprop (2,4-DP) by ozonolysis of chloro derivatives of (pent-3-en-2-yloxy)benzene.
Pyrimidine derivatives, pharmaceutical compositions and method of using
申请人:Hoffmann-La Roche Inc.
公开号:US04886785A1
公开(公告)日:1989-12-12
Compounds of the formula ##STR1## wherein A is C.sub.1-8 -alkylene, R.sup.1 is halogen, C.sub.1-4 -alkyl or halo-(C.sub.1-4 -alkyl), R.sup.2 is hydrogen, hydroxy or acyloxy, R.sup.3 is hydrogen or C.sub.1-4 -alkyl, R.sup.4 is aryl or aryloxy and X is O or NH, and tautomers thereof are described. The compounds of formula I and their tautomers possess antiviral activity and can be used in the form of medicaments for the control and prevention of viral infections.