Patent US4591697A successfully refreshed from Google Patents.
Patent US3839170A successfully refreshed from Google Patents.
US3839170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 3-fluoro-d-alanine
Assignee: Merck and Co Inc
•
Filing: 1972-04-18
•
Granted: 1974-10-01
•
Expires: 1992-04-18
Abstract
Abstract Organic compounds having at least one replaceable hydrogen atom are fluorinated in the liquid or solid state by treatment with fluoroxyperfluoroalkanes or fluoroxypentafluorosulfur under the influence of a free radical initiator.
Inventors
- 👤 J Kollonitsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:23
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/385; C07; C07B; C07B39/00; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/12; C07C51/00; C07C51/347; C07C51/363; C07C53/00; C07C53/15; C07C53/16; C07C53/18; C07C53/19; C07C53/21; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
45 words
A PROCESS FOR THE PREPARATION OF 3-FLUORO-D-ALANINE AND SALTS THEREOF WHICH COMPRISES THE TREATMENT OF D-ALANINE WITH A REGENT SELECTED FROM THE GROUP CONSISTING OF A FLUOROXYPERFLUOROALKANE OR 1-5 CARBON ATOMS AND FLUOROXYPENTFLUOROSULFUR IN THE LIQUID STATE IN THE PRESENCE OF A FREE RADICAL INITIATOR.
Claim 2
Dependent Claim
45 words
A PROCESS FOR THE PREPARATION OF 3-FLUORO-D-ALANINE AND SALTS THEREOF WHICH COMPRISES THE TREATMENT OF D-ALANINE WITH A REGENT SELECTED FROM THE GROUP CONSISTING OF A FLUOROXYPERFLUOROALKANE OR 1-5 CARBON ATOMS AND FLUOROXYPENTFLUOROSULFUR IN THE LIQUID STATE IN THE PRESENCE OF A FREE RADICAL INITIATOR.
Claim 3
Dependent Claim
13 words
The process of claim 1, wherein the free radical initiator is ionizing radiation.
Claim 4
Dependent Claim
12 words
The process of claim 1, wherein the free radical initiator is light.
Claim 5
Dependent Claim
15 words
The process of claim 1, wherein the reagent is a fluoroxyperfluoroalkane of 1-5 carbon atoms.
Claim 6
Dependent Claim
16 words
The process of claim 1, wherein the reaction is conducted in a solvent inert to fluorination.
Claim 7
Dependent Claim
15 words
The process of claim 1, wherein the free radical initiator is a chemical chain initiator.
References Cited (Backward Citations)
US3151051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |