Claims
- 1. A process for making a compound of the formula ##STR10## which comprises combining a compound of the formula: ##STR11## with a carboxylic acid of the formula ##STR12## and hydrobromic acid from between about the boiling temperature of the reaction mixture to about 75.degree. C. for between about one hour until about five days; and wherein:
- R.sub.1 is hydrogen, C.sub.1 to C.sub.10 alkyl, or C.sub.2 to C.sub.6 alkenyl;
- R.sub.2 is methyl or ethyl; and
- R.sub.3 is methyl or ethyl.
- 2. A process of claim 1, wherein R.sub.3 is methyl.
- 3. A process of claim 2, wherein R.sub.2 is methyl.
- 4. A process of claim 3, wherein R.sub.1 is C.sub.1 to C.sub.10 alkyl.
- 5. A process of claim 4, wherein R.sub.1 is C.sub.3 to C.sub.8 alkyl
- 6. A process of claim 5, wherein R.sub.1 is n-propyl.
- 7. A process of claim 3, wherein R.sub.1 is hydrogen.
- 8. A process of claim 2, wherein R.sub.2 is ethyl.
- 9. A process of claim 8, wherein R.sub.1 is C.sub.1 to C.sub.10 alkyl.
- 10. A process of claim 9, wherein R.sub.1 is C.sub.3 to C.sub.8 alkyl.
- 11. A process of claim 10, wherein R.sub.1 is methyl.
Parent Case Info
This application is a continuation, of application Ser. No. 07/064,900, filed June 19, 1987 now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4661505 |
Marshall et al. |
Apr 1987 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
59-65039 |
Apr 1984 |
JPX |
Non-Patent Literature Citations (3)
Entry |
P. Da Re and L. Cimatoribus, Journal of Organic Chemistry, 26, pp. 3650-3653 (1961). |
G. P. Schiemenz and U. Schmidt, Liebigs Annalen der Chemie, pp. 1514-1519 (1976). |
J. March, Advanced Organic Chemistry-Reactions, Mechanism, and Structure, Second Edition, McGraw-Hill Book Company, New York, pp. 394-395 (1977). |
Continuations (1)
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Number |
Date |
Country |
Parent |
64900 |
Jun 1987 |
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