Patent US2091427A successfully refreshed from Google Patents.
Patent US3910953A successfully refreshed from Google Patents.
US3910953A
Expired / Lapsed
US
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Process for the preparation of tryptamine or its derivatives
Assignee: Richter Gedeon Vegyeszeti Gyar Nyrt
•
Filing: 1973-08-16
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Granted: 1975-10-07
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Expires: 1993-08-16
Abstract
Abstract The invention provides a simple and economic process for the preparation of tryptamine or its derivatives, starting from easily available, non-expensive substances.
Inventors
- 👤 Csaba Szantay
- 👤 Lajos Szabo
- 👤 Gyorgy Kalaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:38
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/72; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/14; C07D209/16; C07D209/30; C07D209/42
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
6 words
A CIS-TRANS ISOMERIC MIXTURE OF ETHYL-2-OXO-5-CHLOROVALERATE-PHENYLHYDRAZONE.
Claim 2
Dependent Claim
6 words
A CIS-TRANS ISOMERIC MIXTURE OF ETHYL-2-OXO-5-CHLOROVALERATE-PHENYLHYDRAZONE.
Claim 3
Dependent Claim
6 words
A cis-trans isomeric mixture of ethyl-2-oxo-5-chlorovalerate-4''-methoxyphenylhydrazone.
Claim 4
Dependent Claim
6 words
A cis-trans isomeric mixture of ethyl-2-oxo-5-chlorovalerate-4''-methoxyphenylhydrazone.
Claim 5
Dependent Claim
4 words
Ethyl-tryptamine-2-carboxylate or its salts.
Claim 6
Dependent Claim
4 words
Ethyl-tryptamine-2-carboxylate or its salts.
Claim 7
Dependent Claim
4 words
Ethyl-5-methoxy-tryptamine-2-carboxylate or its salts.
Claim 8
Dependent Claim
4 words
Ethyl-5-methoxy-tryptamine-2-carboxylate or its salts.
Claim 9
Dependent Claim
14 words
A process for the preparation of tryptamine or its derivatives of the formula (I),
Claim 10
Dependent Claim
14 words
A process for the preparation of tryptamine or its derivatives of the formula (I),
Claim 11
Dependent Claim
16 words
The process defined in claim 5 wherein the obtained salt is converted into the free base.
Claim 12
Dependent Claim
29 words
The process as defined in claim 5, in which the partial hydrolysis of the compound of the formula (II) is carried out in ethanol with ethanolic potassium hydroxide solution.
Claim 13
Dependent Claim
32 words
The process as defined in claim 5 in which the reaction with diazotized aniline or with a diazotized aniline derivative of the formula (III) is carried out at a temperature below 0*C.
Claim 14
Dependent Claim
26 words
The process as defined in claim 5 in which the compound of the formula (IV) is heated in butanol at the boiling point of the mixture.
Claim 15
Dependent Claim
40 words
The process defined in claim 5 in which the hyDrolysis and decarboxylation of the new compound of the formula (V) is carried out in aqueous acidic medium containing 10 to 20% sulphuric acid at the boiling point of the mixture.
Claim 16
Dependent Claim
37 words
The process as defined in claim 5 in which the compound of the formula (V) is hydrolized in a solvent medium, preferably in ethanol with an aqueous sodium hydroxide solution, at the boiling point of the mixture.
Claim 17
Dependent Claim
5 words
A compound of the formula
Claim 18
Dependent Claim
5 words
A compound of the formula
Claim 19
Dependent Claim
12 words
A process for the preparation of a compound of the formula (IV),
Claim 20
Dependent Claim
12 words
A process for the preparation of a compound of the formula (IV),
Claim 21
Dependent Claim
6 words
A compound of the formula (V):
Claim 22
Dependent Claim
6 words
A compound of the formula (V):
Claim 23
Dependent Claim
12 words
A process for the preparation of a compound of the formula (V):
Claim 24
Dependent Claim
12 words
A process for the preparation of a compound of the formula (V):
References Cited (Backward Citations)
US3531573A
Cited
US3591603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |