ES8605537A1 - Cyclic ketal(s) prodn. - Google Patents
Cyclic ketal(s) prodn.Info
- Publication number
- ES8605537A1 ES8605537A1 ES544825A ES544825A ES8605537A1 ES 8605537 A1 ES8605537 A1 ES 8605537A1 ES 544825 A ES544825 A ES 544825A ES 544825 A ES544825 A ES 544825A ES 8605537 A1 ES8605537 A1 ES 8605537A1
- Authority
- ES
- Spain
- Prior art keywords
- alkyl
- cyclic ketal
- prodn
- alkenyl
- cyclic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
Cyclic corticoids and their 21C-esters, of formula (I) (where X and X1 = H or F, A = satd. or double bond, R = H or 1-12C alkyl, R1 = H or 1-4C alkyl or alkenyl and R2 = 1-12C alkyl or alkenyl) are made by (a) reaction of 1 mole corticoid with 1.5 moles aldehyde or ketone, in dioxane contg. perchloric acid, under anhydrous conditions; (b) sepn. and purificn. of the cyclic ketal formed; and (c) soln. in pyridine and treatment with the appropriate anhydride to form the required ester.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES544825A ES8605537A1 (en) | 1985-07-03 | 1985-07-03 | Cyclic ketal(s) prodn. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES544825A ES8605537A1 (en) | 1985-07-03 | 1985-07-03 | Cyclic ketal(s) prodn. |
Publications (2)
Publication Number | Publication Date |
---|---|
ES8605537A1 true ES8605537A1 (en) | 1986-02-01 |
ES544825A0 ES544825A0 (en) | 1986-02-01 |
Family
ID=8489463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES544825A Expired ES8605537A1 (en) | 1985-07-03 | 1985-07-03 | Cyclic ketal(s) prodn. |
Country Status (1)
Country | Link |
---|---|
ES (1) | ES8605537A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10711032B2 (en) | 2016-11-08 | 2020-07-14 | Regeneron Pharmaceuticals, Inc. | Steroids and protein-conjugates thereof |
-
1985
- 1985-07-03 ES ES544825A patent/ES8605537A1/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10711032B2 (en) | 2016-11-08 | 2020-07-14 | Regeneron Pharmaceuticals, Inc. | Steroids and protein-conjugates thereof |
Also Published As
Publication number | Publication date |
---|---|
ES544825A0 (en) | 1986-02-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 20051017 |