The present invention relates to 1H-Quinazoline-2,4-diones of formula (I)
wherein R
1
and R
2
are as defined in the specification, their preparation, their use as pharmaceuticals, and pharmaceutical compositions containing them. Further, intermediates for the manufacture of compounds of formula (I) are and combinations comprising compounds of formula (I) are disclosed.
Symmetrical bis(unsymmetrical tertiary-alkyl and tertiary- aralkyl azo)
申请人:Pennwalt Corporation
公开号:US03937761A1
公开(公告)日:1976-02-10
Novel symmetrical bis(unsymmetrical t-alkyl and t-aralykl azo) compounds of the general formula I: R -- N = N -- R.sub.12 -- N = N -- R' (I) wherein R = R' = (R").sub.3 C--, e.g., 1,2-ethylene bis(4-t-butylazo-4-cyanovalerate); and the use of I for sequential generation of free radicals, e.g. styrene monomer and 1,2-ethylene bis(4-t-butylazo-4-cyanovalerate) are reacted to obtain polystyrene containing attached azo groups which in turn is reacted with methyl methacrylate monomer to obtain a block copolymer of polystyrene and poly(methyl methacrylate).
对称的新型双(非对称的t-烷基和t-芳基偶氮基)化合物的一般式I为:R - N = N - R.sub.12 - N = N - R' (I),其中R = R' = (R").sub.3 C--,例如1,2-乙烯基双(4-t-叔丁基偶氮基-4-氰基戊酸酯);以及使用化合物I进行自由基的顺序生成,例如苯乙烯单体和1,2-乙烯基双(4-t-叔丁基偶氮基-4-氰基戊酸酯)反应以获得含有偶氮基的聚苯乙烯,然后再与甲基丙烯酸甲酯单体反应以获得聚苯乙烯和聚甲基丙烯酸甲酯的嵌段共聚物。
Symmetrical bis(unsymmetrical tertiary-alkyl and tertiary-aralkyl azo)
申请人:Pennwalt Corporation
公开号:US03957750A1
公开(公告)日:1976-05-18
Novel symmetrical bis(unsymmetrical t-alkyl and t-aralkyl azo) compounds of the general formula I: r -- n = n -- r.sub.12 -- n = n -- r' (i) where R = R' = (R").sub.3 C--, e.g., 1,2-ethylene bis(4-t-butylazo-4-cyanovalerate); and the use of I for sequential generation of free radicals, e.g. styrene monomer and 1,2-ethylene bis(4-t-butylazo-4-cyanovalerate) are reacted to obtain polystyrene containing attached azo groups which in turn is reacted with methyl methacrylate monomer to obtain a block copolymer of polystyrene and poly(methyl methacrylate).
化合物I的通式为:r -- n = n -- r.sub.12 -- n = n -- r' (i),其中R = R' = (R").sub.3 C--,例如1,2-乙烯基双(4-t-丁基偶氮基-4-氰基酸酯)。该化合物可用于顺序自由基产生,例如,苯乙烯单体和1,2-乙烯基双(4-t-丁基偶氮基-4-氰基酸酯)反应,得到含有偶氮基的聚苯乙烯,然后再与甲基丙烯酸甲酯单体反应,得到聚苯乙烯和聚甲基丙烯酸甲酯的嵌段共聚物。
Combatting dandruff with mercapto quinoline N-oxides
申请人:Ciba-Geigy Corporation
公开号:US03961054A1
公开(公告)日:1976-06-01
The invention relates to a method for combatting dandruff and anti-dandruff shampoos containing compounds having the structural formula in tautomeric form: ##SPC1## And metal salts and complexes thereof wherein R.sub.1 and R.sub.2 are hydrogen, alkyl, cycloalkyl, aryl, alkylthio, halogen, nitro, trifluoromethyl or alkoxy; x is an integer from 1 to 4 and y is an integer from 1 to 2.