Claims
- 1. Gamma-lactone derivatives represented by the formula (I) ##STR26## wherein R.sup.1 is methyl group or is combined with R.sup.2 to form a methylene group;
- R.sup.2 is hydrogen, a hydroxyl group or a trifluoroacetoxyl group, or is combined with R.sup.1 as above recited, or is combined with R.sup.3 to form a pi bond;
- R.sup.3 is hydrogen or is combined with R.sup.2 as above recited; R.sup.4 and R.sup.6 are each hydrogen, or are combined to form a pi bond;
- R.sup.5 is hydrogen or a protecting group for a hydroxyl group;
- R.sup.7 is hydrogen or a straight-chain or a branched alkyl group; and
- St is a steroid nucleus represented by the following formula (B): ##STR27##
- 2. Gamma-lactone derivatives claimed in the claim 1 wherein the gamma-lactone derivative is (2R, 3S,20R,22R)-6,6-ethylenedioxy-20-hydroxy-2,3-isopropylidenedioxy-23-methoxymethoxy-5.alpha.-ergost-23-eno-28,22-lactone.
- 3. Gamma-lactone derivatives claimed in the claim 1 wherein the gamma-lactone derivative is (2R, 3S,20Z)-6,6-ethylenedioxy-2,3-isopropylidenedioxy-23-methoxymethoxy-5.alpha.-ergost-20(22),23-diene-28,22-lactone.
- 4. Gamma-lactone derivative claimed in the claim 1 wherein the gamma-lactone derivative is (2R, 3S,22R,23R,24S)-6-,6-ethylenedioxy-2,3-isopropylidenedioxy-23-methoxymethoxy-5.alpha.-ergostano-28,22-lactone.
Parent Case Info
This is a divisional of co-pending application Ser. No. 07/034,734 filed on Apr. 6, 1987 now U.S. Pat. No. 4,874,551.
Non-Patent Literature Citations (2)
Entry |
Kametani I, Chem Abs 105, 191498 (1986). |
Kametani II, Chem Abs 107, 154592. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
34734 |
Apr 1987 |
|