Claims
- 1. A process for preparing a compound of formula (I) ##STR16## wherein R is a methylthio, methylsulfoxy, methylsulfonyl or a nitro group; and
- X4 is --OH, fluorine or --O--SO.sub.2 R6 where R6 is methyl, trifluoromethyl, phenyl or p-methylphenyl which comprises contacting of a compound of formula (III) ##STR17## where R2 is C.sub.1-4 alkyl; and R and X4 have the above mentioned meanings, with a strong base selected from the group consisting of alkali earth metal alcoholates, alkaline earth metal alcoholates, and tertiary amines in an aprotic solvent, to obtain the compound of formula (I).
- 2. A process according to claim 1, wherein the alkali metal alcoholate is potassium tert butylate.
- 3. A process according to claim 1, wherein the aprotic solvent is an aromatic hydrocarbon.
- 4. A process according to claim 3, wherein the aromatic hydrocarbon is benzene or toluene.
Priority Claims (2)
Number |
Date |
Country |
Kind |
21417 A/83 |
Jun 1983 |
ITX |
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22449 A/83 |
Aug 1983 |
ITX |
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Parent Case Info
This is a division of application Ser. No. 07/841,075, filed on Feb. 25, 1992 now U.S. Pat. No. 5,243,056, which is a division of Appln. Ser. No. 07/162,247, filed Feb. 29, 1988, now U.S. Pat. No. 5,105,009 which is a continuation of Appln. Ser. No. 06/616,086, filed Jun. 1, 1984, now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (1)
Number |
Date |
Country |
876750 |
Jul 1971 |
CAX |
Divisions (2)
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Number |
Date |
Country |
Parent |
841075 |
Feb 1992 |
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Parent |
162247 |
Feb 1988 |
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Continuations (1)
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Number |
Date |
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Parent |
616086 |
Jun 1984 |
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