Claims
- 1. A process for the preparation of compounds of the formula: ##STR3## in which R is a saturated or unsaturated alkyl group of up to 6 carbon atoms or the group alk-ar, wherein alk is a methylene-, ethylene- or propylene- group and ar is a substituted or unsubstituted phenyl-, furyl-, or pyridyl- ring wherein the substituent is methoxy or chloro; wherein a compound of the formula: ##STR4## in which R has the above meaning and R.sub.1 is an alkyl group of up to 8 carbon atoms, is condensed with a dialkyl oxalate of the formula: ##STR5## in which R.sub.2 is an alkyl group of up to 3 carbon atoms, in an anhydrous lower alcohol of up to 3 carbon atoms in the presence of a corresponding alkali metal alcoholate at a temperature in the range of 70.degree. to 90.degree. C.
- 2. Process according to claim 1, wherein the dialkyl oxalate used is diethyl oxalate.
- 3. Process according to claim 1, wherein the lower alcohol used is methanol, ethanol, isopropanol, n-propanol or tert.-butanol.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2636722 |
Aug 1976 |
DEX |
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Parent Case Info
This is a division of application Ser. No. 821,260 filed Aug. 3, 1977, abandoned.
Non-Patent Literature Citations (1)
Entry |
Southwick et al., J. A. C. S., vol. 75, pp. 3413 to 3417, (1953). |
Divisions (1)
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Number |
Date |
Country |
Parent |
821260 |
Aug 1977 |
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