Claims
- 1. A compound of the formula (XIX) or a tautomer or salt thereof ##STR33## where R.sup.9 is selected from lower alkyl, phenyl, phenyl substituted by one or more hydroxy or lower alkoxy, or pyridyl.
- 2. The compound of claim 1 in which R.sup.9 is methyl.
- 3. The compound of claim 1 in which R.sup.9 is phenyl.
- 4. The compound of claim 1 in which R.sup.9 is 3,4,5-trimethoxyphenyl.
- 5. The compound of claim 1 in which R.sup.9 is 3-hydroxphenyl.
- 6. A method of preparing a compound of formula (XIX), as defined in claim 1, which comprises heating in aqueous acid a compound of the formula (XX) ##STR34## wherein R.sup.10 is selected from lower alkyl, phenyl, phenyl substituted by one or more hydroxy or lower alkoxy, pyridyl and R.sup.11 is selected from lower alkyl, phenyl, substituted by one or more hydroxy or lower alkoxy pyridyl --CO.sub.2 R where R is lower alkyl.
Parent Case Info
This is a division of application Ser. No. 926,072 filed July 19, 1978 now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3098075 |
Druey et al. |
Jul 1963 |
|
3165520 |
Schmidt et al. |
Jan 1965 |
|
3947442 |
Beckwith |
Mar 1976 |
|
Foreign Referenced Citations (3)
Number |
Date |
Country |
383 |
Jan 1979 |
EPX |
380151 |
Sep 1964 |
CHX |
798646 |
Jul 1958 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Hauser, et al., "J. Org. Chem.", vol. 26, 1961, pp. 451-455. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
926072 |
Jul 1978 |
|