Claims
- 1. A compound of the formula ##STR7## wherein each of R.sub.1 and R.sub.1 ' is lower alkyl, aryl or benzyl, each of R.sub.2, R.sub.3 and R.sub.4 is hydrogen or lower alkyl and Z is the residue of a dienophile moiety selected from the group consisting of 4-phenyl-1,2,4-triazoline-3,5-dione.
- 2. The compound of claim 1 wherein R.sub.1 is methyl or ethyl.
- 3. The compound of claim 1 wherein each of R.sub.2, R.sub.3 and R.sub.4 is hydrogen.
- 4. The compound of claim 3 which is 2-phenyl-6-(O,O-diethylphosphoryloxy)-2,3,5,8-tetrahydro-1H-s-triazolo-pyridazine-1,3-dione.
Parent Case Info
This is a division of application Ser. No. 618,853 filed Oct. 2, 1975 now U.S. Pat. No. 4,025,584 which in turn is a division of application Ser. No. 497,598, filed Aug. 15, 1974, now U.S. Pat. 3,933,948, granted Jan. 20, 1976.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3706743 |
Moon |
Dec 1972 |
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Divisions (2)
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Number |
Date |
Country |
Parent |
618853 |
Oct 1975 |
|
Parent |
497598 |
Aug 1974 |
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