Claims
- 1. A compound of formula where the C═C double bond is present in an E and/or Z configuration, and;R1 is COOR5; R2 is COOR6; R3 is hydrogen; R4 is a substituted or unsubstituted aromatic or heteroaromatic group having up to 8 carbon atoms; wherein R5 and R6 independently are each a substituted or unsubstituted aromatic group having up to 8 carbon atoms.
- 2. The compound of claim 1 wherein R4 is a substituted phenyl, thienyl, furyl, pyridyl, indolyl or naphthyl group.
- 3. The compound of claim 2 wherein R4 is an substituted or unsubstituted phenyl or thienyl group.
- 4. The compound of claim 3, wherein the phenyl or thienyl group is substituted by a member selected from the group consisting of methoxy, ethoxy, isopropoxy, n-propoxy, 1-methylpropoxy, n-butoxy, n-pentoxy, 2-methylpropoxy, 3-methylbutoxy, 1,1-dimethylpropoxy, 2,2-dimethylpropoxy, hexoxy, 1-methyl-ethylpropoxy, heptoxy octoxy and 2-ethylhexoxy.
- 5. The compound of claim 1, wherein R4 is a substituted phenyl, thienyl, furyl, pyridyl, indolyl or naphthyl group.
Priority Claims (2)
Number |
Date |
Country |
Kind |
196 49 381 |
Nov 1996 |
DE |
|
197 12 033 |
Mar 1997 |
DE |
|
Parent Case Info
This application is a division of application Ser. No. 09/266,968, filed Mar. 12, 1999, now U.S. Pat. No. 6,037,487, which is a division of application Ser. No. 08/972,391, filed Nov. 18, 1997, now U.S. Pat. No. 5,945,091.
US Referenced Citations (6)
Foreign Referenced Citations (6)
Number |
Date |
Country |
3825382 |
Feb 1989 |
DE |
251398 |
Jan 1988 |
EP |
514491 |
Nov 1992 |
EP |
2285881 |
Apr 1976 |
FR |
2440933 |
Jun 1980 |
FR |
9111989 |
Aug 1991 |
WO |
Non-Patent Literature Citations (6)
Entry |
Dains et al., J. Am. Chem. Soc., vol. 31, 1909, pp. 1148-1157. |
Dains et al., J. Am. Chem. Soc., vol. 40, 1918, pp. 562-569. (Mar. 1918). |
Mapara et al., J. Ind. Chem. Soc., vol. 31, No. 12, 1954, pp. 951-956. (Mar. 1918). |
Derwent Abstract, Section Ch, Week 198712, XP002138150 (JP 62036484, Feb. 17, 1987). |
Wolfbeis, Synthesis, Oct. 1977, pp. 723-725. |
Michalik, J. fur Prak. Chem., vol. 327, No. 6, 1985, pp. 908-916. |