Claims
- 1. A process for preparing compounds of formula ##STR54## wherein R may represent: phenyl; phenyl substituted by a radical selected from (C.sub.1-4)alkyl, (C.sub.1-4)alkoxy, fluoro, chloro, bromo, nitro, amino, cyano, carbamoyl, carboxy, hydroxymethyl, methylenedioxy and trifluoromethyl; dichlorophenyl; dimethoxyphenyl;
- 3. 4,5-trimethoxyphenyl;
- R.sub.2 represents a (C.sub.1-4)alkyl group and R.sub.5 stands for hydrogen or chloro, which comprises subjecting to thermal or acid-catalyzed rearrangement a benzoxazine derivative of formula ##STR55## wherein R, R.sub.2 and R.sub.5 are as above defined.
CROSS REFERENCE TO RELATED APPLICATION
This is a division, of application Ser. No. 720,479 filed 9/3/78*, now U.S. Pat. 4,119,635. *which in turn is a continuation-in-part of application Ser. No. 272,105, Filed July 17, 1972, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3862954 |
Omodei-Sale |
Jan 1975 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
720479 |
Sep 1978 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
272105 |
Jul 1972 |
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