US3846476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-benzyloxycarbonyl-dopa derivatives
Assignee: F Hoffmann La Roche AG
•
Filing: 1971-10-14
•
Granted: 1974-11-05
•
Expires: 1991-10-14
Abstract
Abstract A method for preparing N-benzyloxycarbonyl-dopa derivatives useful as hypotensive, anti-pyretic and anti-Parkinson agents.
Inventors
- 👤 A Kaiser
- 👤 W Koch
- 👤 M Scheer
- 👤 U Wolcke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:11
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C07F5/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
15 words
The compound of claim 1 wherein R1'', R2'', R3'', R5'', R6'' and R7'' are hydrogen.
Claim 4
Dependent Claim
12 words
The compound of claim 2 wherein said compound is N-benzyloxycarbonyl-L-dopa benzyl ester.
Claim 5
Dependent Claim
13 words
The compound of claim 2 wherein said compound is N-benzyloxycarbonyl L-dopa methyl ester.
Claim 6
Dependent Claim
16 words
The compound of claim 1 wherein at least one of R5'', R6'' and R7'' is halogen.
Claim 7
Dependent Claim
10 words
The compound of claim 5 wherein said compound is N-benzyloxycarbonyl-3,4-dihydroxy-6-bromo-L-phenylalanine.
Claim 8
Dependent Claim
17 words
The compound of claim 1 wherein at least one of R5'', Rd 6'' or R7'' is alkoxy.
Claim 9
Dependent Claim
10 words
The compound of claim 7 wherein said compound is N-benzyloxycarbonyl-5-methoxy-D,L-dopa.
Claim 10
Dependent Claim
16 words
The compound of claim 1 wherein at least one of R1'', R2'' or R3'' is alkyl.
Claim 11
Dependent Claim
13 words
The compound of claim 9 wherein said compound is N-benzyloxycarbonyl-D,L- Alpha -methyl dopa.
Claim 12
Dependent Claim
19 words
The compound of claim 9 wherein said compound is N-benzyloxycarbonyl-D,L- Beta -(3,4-dihydroxyphenyl)- Alpha , Beta , Beta , -trimethylalanine.
Claim 13
Dependent Claim
9 words
A process for preparing a compound of the formula
Claim 14
Dependent Claim
9 words
A process for preparing a compound of the formula
References Cited (Backward Citations)
US3243423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |