US3734930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct synthesis of ({31 )-trans-{66 {11 tetrahydrocannabinol from olivetol and ({30 )-trans-{66 {11 -carene oxide
Assignee: Individual
•
Filing: 1971-09-22
•
Granted: 1973-05-22
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Expires: 1991-09-22
Abstract
Abstract A one step stereospecific synthesis of Delta 9tetrahydrocannabinol by the condensation of olivetol with Delta 2-carene oxide is disclosed.
Inventors
- 👤 R Razdan
- 👤 G Handrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:54
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
19 words
A method as defined in claim 1, wherein said condensation is performed in the presence of an acid catalyst.
Claim 2
Dependent Claim
22 words
A method as defined in claim 1, wherein said catalyst is selected from the group consisting of boron trifluoride and p-toluenesulfonic acid.
Claim 3
Dependent Claim
29 words
A method as defined in claim 3, wherein said Delta 2-carene oxide and said olivetol are present in a molar ratio of 1.6:1 and said catalyst is p-toluenesulfonic acid.
Claim 4
Dependent Claim
20 words
A method as defined in claim 3, wherein said Delta 2-cArene oxide and said olivetol are present in equimolar amounts.
Claim 5
Dependent Claim
21 words
A method as defined in claim 1, further comprising separating said Delta 9-tetrahydrocannabinol into trans- Delta 9-tetrahydrocannabinol and cis- Delta 9-tetrahydrocannabinol.
Claim 6
Dependent Claim
19 words
A method as defined in claim 6, wherein said trans- and cis-Delta 9-tetrahydrocannabinol are separated by vapor phase chromatography.
References Cited (Backward Citations)
US3668224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |