Claims
- 1. The compound having the structure: ##STR22## wherein R.sup.5 and R.sup.6 are removable protecting groups.
- 2. A process for preparing the compound: ##STR23## comprising the cycloaddition of: ##STR24## with
- CH.sub.3 CH.dbd.CHCOOR.sup.6
- wherein R.sup.5 and R.sup.6 are removable carboxyl protecting groups.
Parent Case Info
This is a continuation of application Ser. No. 219,630 filed Dec. 24, 1980, which was a division of Ser. No. 112,057 filed Jan. 14, 1980, now U.S. Pat. No. 4,269,772.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3524001 |
Wright |
Aug 1920 |
|
3852299 |
Hutchinson |
Dec 1974 |
|
Non-Patent Literature Citations (1)
Entry |
Kametini et al. Heterocycles, vol. 14, No. 1980, p. 83. |
Divisions (1)
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Number |
Date |
Country |
Parent |
112057 |
Jan 1980 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
219630 |
Dec 1980 |
|