US4056571A
Expired / Lapsed
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Process for the preparation of tertiary phosphine oxides
Assignee: Hoechst AG
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Filing: 1976-06-21
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Granted: 1977-11-01
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Expires: 1996-06-21
Abstract
Abstract Tertiary phosphine oxides are obtained by adding olefins having a terminal hydroxy or amino group or functional derivatives thereof to secondary phosphine oxides. The adducts are useful as intermediates in the preparation of flame-retardant agents, anti-corrosive agents, pesticides, pharmaceuticals and detergents.
Inventors
- 👤 Hans-Jerg Kleiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:27
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5304; C07F9/547; C07F9/645; C07F9/6503; C07F9/6506
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
40 words
A compound of the formula ##STR11## in which R 1 and R 2 are alkyl of 1 to 12 carbon atoms, n is 3, and R is --NR.sub.4 R.sub.5 in which R 4 is hydrogen, and R 5 is hydrogen.
Claim 2
Dependent Claim
40 words
A compound of the formula ##STR11## in which R 1 and R 2 are alkyl of 1 to 12 carbon atoms, n is 3, and R is --NR.sub.4 R.sub.5 in which R 4 is hydrogen, and R 5 is hydrogen.
Claim 3
Dependent Claim
16 words
The compound as defined in claim 1, in which R 1 and R 2 are methyl.
Claim 4
Dependent Claim
15 words
The compound as defined in claim 1, wherein R 1 and R 2 are ethyl.
Claim 5
Dependent Claim
40 words
A compound of the formula ##STR12## in which R 1 and R 2 are cycloalkyl of 4 to 8 carbon atoms, n is 3, and R is --NR.sub.4 R.sub.5 in which R 4 is hydrogen, and R 5 is hydrogen.
Claim 6
Dependent Claim
40 words
A compound of the formula ##STR12## in which R 1 and R 2 are cycloalkyl of 4 to 8 carbon atoms, n is 3, and R is --NR.sub.4 R.sub.5 in which R 4 is hydrogen, and R 5 is hydrogen.
Claim 7
Dependent Claim
108 words
A process for the preparation of a compound ##STR13## in which R 1 and R 2 are alkyl of 1 to 12 carbon atoms, n is 3, and R is --NR.sub.4 R.sub.5 in which R 4 is hydrogen, and R 5 is hydrogen, and which comprises reacting a dialkyl phosphine oxide of the formula ##STR14## wherein R 1 and R 2 are as defined above, with an olefin of the formula H.sub.2 C ═ CH -- CH.sub.2 -- NH.sub.2 wherein R and n have the above meanings, in the presence of a catalytic amount of a free radical-forming agent at a temperature between 80° and about 180° C.
Claim 8
Dependent Claim
108 words
A process for the preparation of a compound ##STR13## in which R 1 and R 2 are alkyl of 1 to 12 carbon atoms, n is 3, and R is --NR.sub.4 R.sub.5 in which R 4 is hydrogen, and R 5 is hydrogen, and which comprises reacting a dialkyl phosphine oxide of the formula ##STR14## wherein R 1 and R 2 are as defined above, with an olefin of the formula H.sub.2 C ═ CH -- CH.sub.2 -- NH.sub.2 wherein R and n have the above meanings, in the presence of a catalytic amount of a free radical-forming agent at a temperature between 80° and about 180° C.
Claim 9
Dependent Claim
23 words
A process as defined in claim 5, wherein instead of using a free radical-forming agent, the reaction mixture is exposed to ultraviolet light.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |