Patent US3755118A successfully refreshed from Google Patents.
US3755118A
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Process for preparing loganin and analogs thereof
Assignee: Individual
•
Filing: 1970-01-05
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Granted: 1973-08-28
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Expires: 1990-01-05
Abstract
Abstract The present invention relates to a process for the preparation of loganin and analogs thereof. Loganin and analogs thereof are useful in the preparation of alkaloids.
Inventors
- 👤 J Partridge
- 👤 M Uskokovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:00
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/94
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
36 words
A process as defined in claim 1 wherein R1 is selected from the group consisting of hydrogen, lower alkanoyl, and tetrahydropyranyl,; and R2 is selected from the group consisting of hydrogen, -CH2-O-lower alkyl and lower alkyl.
Claim 2
Dependent Claim
32 words
A process as defined in claim 2 wherein R1 is selected from the group consisting of tetrahydropyranyl and acetyl and R2 is selected from the group consisting of hydrogen, methoxymethyl and methyl.
Claim 3
Dependent Claim
11 words
A process for the preparation of a compound of the formula
Claim 4
Dependent Claim
42 words
A process as defined in claim 4 wherein R1 is selected from the group consisting of hydrogen, lower alkanoyl, and tetrahydropyranyl; R2 is selected from the group consisting of hydrogen, -CH2-O-lower alkyl and lower alkyl and R3 is lower alkyl or tetraacetylglucopyranosyl.
Claim 5
Dependent Claim
42 words
A process as defined in claim 5 wherein R1 is selected from the group consisting of tetrahydropyranyl and acetyl, R2 is selected from the group consisting of hydrogen, methoxymethyl and methyl and R3 is selected from the group consisting of lower alkyl.
References Cited (Backward Citations)
US3089877A
Cited
US3154565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |