Claims
- 1. A 4-(1-R-2-R.sub.1 -5/6-Y-3-indolyl)-2,3-dichloro-4-oxo-2-butenoic acid having the formula ##STR12## wherein: R represents hydrogen, non-tertiary alkyl of one to eight carbon atoms, alkenyl of two to four carbon atoms, benzyl or benzyl substituted in the benzene ring by one or two of halo or alkyl of one to three carbon atoms;
- R.sub.1 represents hydrogen, alkyl of one to three carbon atoms or phenyl; and
- Y represents one or two hydrogen, alkyl of one to three carbon atoms, alkoxy of one to three carbon atoms, halo or nitro.
- 2. 4-(1,2-Dimethyl-3-indolyl)-2,3-dichloro-4-oxo-2-butenoic acid according to claim 1.
- 3. 4-(1-Ethyl-2-methyl-3-indolyl)-2,3-dichloro-4-oxo-2-butenoic acid according to claim 1.
- 4. 4-(2-methyl-3-indolyl)-2,3-dichloro-4-oxo-2-butenoic acid according to claim 1.
- 5. 4-(2-Phenyl-3-indolyl)-2,3-dichloro-4-oxo-2-butenoic acid according to claim 1.
Parent Case Info
This application is a division of prior copending application Ser. No. 166,209, filed July 7, 1980, now U.S. Pat. No. 4,377,689 issued Mar. 22, 1983, which, in turn, is a division of prior copending application Ser. No. 058,960, filed July 19, 1979, now U.S. Pat. No. 4,275,121 issued June 23, 1981, which, in turn, is a continuation-in-part of prior copending application Ser. No. 829,002, filed Aug. 30, 1977 (and now abandoned), which is a division of copending application Ser. No. 651,607, filed Jan. 22, 1976, and now U.S. Pat. No. 4,075,224 issued Feb. 2, 1978.
US Referenced Citations (5)
Non-Patent Literature Citations (4)
Entry |
Rees and Sabet in the Journal of the Chemical Society, 687-691, (1965), [Chemical Abstracts 62: 6475h, (1965)]. |
Barrett, Beer, Dodd and Robertson in the Journal of the Chemical Society, 4810-4813, (1957), [Chem. Abstracts 52: 10053e, 1958]. |
Diels and Alder in Annalen Der Chemie 490: 277-294, (1931), [Chemical Abstracts 26: 438, (1932)]. |
Jackson and Naidoo in Journal Chemical Society, Perkins Transactions II; (5): 548-551, (1973), [Chemical Abstracts 78: 12439h, (1973)]. |
Divisions (3)
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Number |
Date |
Country |
Parent |
166209 |
Jul 1980 |
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Parent |
058960 |
Jul 1979 |
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Parent |
651607 |
Jan 1976 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
829002 |
Aug 1977 |
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