Claims
- 1. A compound of the formula Ia ##STR77## wherein R.sub.1 is .gamma.-methoxypropyl, an unsubstituted alkyl group having 1-18 carbon atoms, an unsubstituted cycloalkyl group having 5-8 carbon atoms, a benzyl or .beta.-phenylethyl group, R.sub.2 is hydrogen or an unsubstituted alkyl group having 1-18 carbon atoms and R.sub.3 is hydrogen, an unsubstituted alkyl group having 1-18 carbon atoms, a benzyl or .beta.-phenylethyl group, a phenyl group which is unsubstituted or is substituted by halogen atoms or alkyl or alkoxy groups having 1-4 carbon atoms, a naphthyl-1 or naphthyl-2group, or R.sub.2 and R.sub.3 conjointly form an unsubstituted 4-membered to 11-membered alkylene chain, provided that at least one of R.sub.1 and R.sub.3 contains one of the aryl moieties described above, the R.sub.4 groups are each hydrogen and the R.sub.5 groups are independently of one another hydrogen or methyl or the R.sub.4 groups are each methyl and the R.sub.5 groups are each hydrogen.
- 2. A compound of claim 1, wherein R.sub.1 is an unsubstituted alkyl group having 1-8 carbon atoms, a cyclohexyl group or a benzyl group, R.sub.2 is hydrogen or an unsubstituted alkyl group having 1-8 carbon atoms, R.sub.3 is hydrogen, an unsubstituted alkyl group having 1-8 carbon atoms, phenyl or chlorophenyl, and the R.sub.4 and R.sub.5 groups are each hydrogen.
- 3. A compound of claim 1, wherein R.sub.1 is an unsubstituted alkyl group having 1-4 carbon atoms, R.sub.2 is hydrogen or the methyl group, R.sub.3 is the phenyl group, and the R.sub.4 and R.sub.5 groups are each hydrogen.
- 4. A compound as claimed in claim 1 having the formula ##STR78##
Priority Claims (2)
Number |
Date |
Country |
Kind |
2544/74 |
Feb 1974 |
CHX |
|
12518/74 |
Sep 1974 |
CHX |
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Parent Case Info
This is a division of application Ser. No. 551,481 filed on Feb. 20, 1975 now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
2276587 |
Mettler et al. |
Mar 1942 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
551481 |
Feb 1975 |
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