Claims
- 1. A compound of the formula: ##STR15## wherein X is chlorine, bromine or iodine; Y and Z are selected independently from hydrogen, chlorine and bromine; with the provision that one and only one of Y and Z is hydrogen.
- 2. A compound according to claim 1 wherein X and Y are chlorine and Z is hydrogen.
- 3. A compound according to claim 1 wherein X and Z are chlorine and Y is hydrogen.
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a divisional application of U.S. application Ser. No. 290,190 filed Sept. 18, 1972 now U.S. Pat. No. 3,862,833 granted Jan. 28, 1975.
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Number |
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2847473 |
Robertson |
Aug 1958 |
|
3279907 |
Linder et al. |
Oct 1966 |
|
3527594 |
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Sep 1970 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
979,132 |
Jan 1965 |
GBX |
Non-Patent Literature Citations (4)
Entry |
Kadaba, Journal of Pharmaceutical Sciences, vol. 59, pp. 1190-1191 (1970). |
Beran et al., C. A. vol. 43, Col. 7625-7626 (1949). |
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Divisions (1)
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Number |
Date |
Country |
Parent |
290190 |
Sep 1972 |
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