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4-(4'-Hydroxycyclohexyl)-2,2,6,6-tetramethyl piperidines
| Details |
Inventors: Smith, Malcolm John; Randell, Donald Richard;
Assignee: Ciba-Geigy Corporation (Ardsley, NY)
Primary Examiner: Winters; Sherman D.
Assistant Examiner:
Attorney, Agent or Firm: Shust; Nestor W.
A compound having the formula:- ##SPC1## And salts thereof, wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and each is hydrogen, an alkyl residue having from 1 to 9 carbon atoms, a cycloalkyl residue having from 5 to 14 carbon atoms or a cycloalkyl-alkyl residue having from 7 to 14 carbon atoms, Y is hydrogen, 0.degree., an alkyl residue having from 1 to 4 carbon atoms, or an aralkyl residue having from 7 to 12 carbon atoms and Z is hydrogen, an unsubstituted or substituted alkyl residue having from 1 to 20 carbon atoms, an alkenyl or alkynyl residue having from 2 to 20 carbon atoms, a cycloalkyl residue having from 5 to 12 carbon atoms, an aralkyl residue having from 7 to 12 carbon atoms, an aryl residue having from 6 to 12 carbon atoms, or the group having the formula: wherein Z.sub.1 has the same significance as Z as hereinbefore defined, or Z.sub.1 is a group --NR.sub.5 R.sub.6 wherein R.sub.5 is hydrogen or an alkyl residue having from 1 to 4 carbon atoms and R.sub.6 is hydrogen, an alkyl group having from 1 to 20 carbon atoms, a cycloalkyl group having from 5 to 12 carbon atoms, an aralkyl residue having from 7 to 12 carbon atoms or an aryl residue having from 6 to 12 carbon atoms having light stabilising activity. |
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DETAILED DESCRIPTION We claim: 1.
A compound having the formula: ##SPC12## wherein R.
sub.
1, R.
sub.
2, R.
sub.
3 and R.
sub.
4 are the same or different and each is hydrogen, an alkyl having from 1 to 9 carbon atoms, a cycloalkyl having from 5 to 14 carbon atoms or a cycloalkyl-alkyl having from 7 to 14 carbon atoms, Y is hydrogen, O, an alkyl having from 1 to 4 carbon atoms, or an aralkyl having from 7 to 12 carbon atoms and being selected from the group selected of benzyl, .
alpha.
-methylbenzyl, p-methylbenzyl and .
alpha.
-naphthylbenzyl, and Z is hydrogen, an unsubstituted alkyl or alkyl substituted by hydroxy or cyano groups, said alkyl groups having from 1 to 20 carbon atoms, an alkenyl or alkynyl having from 2 to 20 carbon atoms, a cycloalkyl having from 5 to 12 carbon atoms, an aralkyl having from 7 to 12 carbon atoms and being selected from benzyl, .
alpha.
, .
alpha.
-dimethylbenzyl and .
alpha.
-methylbenzyl, an aryl having from 6 to 12 carbon atoms and being selected from phenyl, tolyl, naphthyl and p-t-butylphenyl, or the group having the formula: --COZ.
sub.
1 wherein Z.
sub.
1 has the same significance as Z as hereinbefore defined, or Z.
sub.
1 is a group --NR.
sub.
5 R.
sub.
6 wherein R.
sub.
5 is hydrogen or an alkyl having 1 to 4 carbon atoms and R.
sub.
6 is hydrogen, an alkyl group having from 1 to 20 carbon atoms, a cycloalkyl group having from 5 to 12 carbon atoms, an aralkyl having from 7 to 12 carbon atoms as defined above or an aryl having from 6 to 12 carbon atoms as defined above, or hydrogen chloride, sulfuric acid, phosphoric acid, carbonic acid, acetic acid, maleic acid, malic acid, oxalic acid or tartaric acid salt of a compound of Formula I.
2.
A compound as claimed in claim 1 wherein at least two of substituents R.
sub.
1, R.
sub.
2, R.
sub.
3 and R.
sub.
4 are hydrogen.
3.
A compound as claimed in claim 2 wherein R.
sub.
2 and/or R.
sub.
3 are hydrogen, methyl or ethyl.
4.
A compound as claimed in claim 3 wherein Y is O, hydrogen or a methyl.
5.
A compound as claimed in claim 4 wherein Z is hydrogen
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Vasodialators 
