Claims
- 1. A process for preparing a compound of the formula: ##STR14## wherein R.sup.1 is the same as R.sup.2 and each is lower alkyl and R.sup.3 and R.sup.4 are each lower alkyl, with the proviso that R.sup.1 and R.sup.2 are not methyl and R.sup.3 and R.sup.4 are not both ethyl, which comprises the steps of: reducing an unsaturated ester of the formula ##STR15## wherein R is a lower alkyl with diisobutyl-aluminum-hydride to an aldehyde of the formula: ##STR16## and condensing the compound thus obtained with .beta.-(3-hydroxy-4-lower alkoxy-phenyl)-ethyl amine and alkylating the compound of the formula: ##STR17## thus obtained.
- 2. A process for preparing a compound of the following formula: ##STR18## wherein R.sup.1 is the same as R.sup.2 and each is lower alkyl and R.sup.3 and R.sup.4 are different from each other and are each lower alkyl, which comprises the steps of: reducing an unsaturated ester of the general formula: ##STR19## wherein R is a lower alkyl group, with diisobutyl-aluminum-hydride to an aldehyde of the formula: ##STR20## and condensing the compound thus obtained with .beta.-(3-hydroxy-4-lower alkoxy-phenyl)-ethyl amine and alkylating the compound of the formula: ##STR21## thus obtained.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of Ser. No. 634,274 (now abandoned), filed Nov. 21, 1975 as a continuation-in-part of U.S. application Ser. No. 372,425 filed June 21, 1975 now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (2)
Number |
Date |
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217920 |
May 1957 |
AUX |
197383 |
Apr 1958 |
ATX |
Continuations (1)
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Number |
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Parent |
634274 |
Nov 1975 |
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Continuation in Parts (1)
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372425 |
Jun 1975 |
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