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US4089884A
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Tris(triorganosilylalkyl) phosphites and method for preparing them
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1977-07-12
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Granted: 1978-05-16
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Expires: 1997-07-12
Abstract
Abstract A novel class of compounds, tris(triorganosilylalkyl) phosphites, represented by the general formula [R3Si(CH2)nO]3P where R is a monovalent hydrocarbon group and n is 1, 2 or 3. These novel compounds may be synthesized by dehydrochlorination reaction between a triorganosilyl-substituted alkanol and phosphorus trichloride in the presence of a tertiary amine. They have useful values as agricultural chemicals because of their biological activities and also as intermediate compounds in the preparation of certain medicines and chemicals.
Inventors
- 👤 Toshio Shinohara
- 👤 Masatoshi Arai
- 👤 Kenichi Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:00
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/1411
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
33 words
A tris(triorganosilylalkyl) phosphite represented by the general formula [R 3 Si(CH 2 ) n O] 3 P where R is a substituted or unsubstituted monovalent hydrocarbon group and n is a positive integer.
Claim 2
Dependent Claim
33 words
A tris(triorganosilylalkyl) phosphite represented by the general formula [R 3 Si(CH 2 ) n O] 3 P where R is a substituted or unsubstituted monovalent hydrocarbon group and n is a positive integer.
Claim 3
Dependent Claim
19 words
The tris(triorganosilylalkyl) phosphite as claimed in claim 1 wherein the group represented by symbol R is an alkyl group.
Claim 4
Dependent Claim
21 words
The tris(triorganosilylalkyl) phosphite as claimed in claim 1 wherein the positive integer expressed by symbol n is 1, 2 or 3.
Claim 5
Dependent Claim
15 words
Tris(trimethylsilylmethyl) phosphite expressed by the formula [(CH 3 ) 3 SiCH 2 O] 3 P.
Claim 6
Dependent Claim
15 words
Tris(trimethylsilylmethyl) phosphite expressed by the formula [(CH 3 ) 3 SiCH 2 O] 3 P.
Claim 7
Dependent Claim
17 words
Tris(trimethylsilylpropyl) phosphite expressed by the formula [(CH 3 ) 3 Si(CH 2 ) 3 O] 3 P.
Claim 8
Dependent Claim
17 words
Tris(trimethylsilylpropyl) phosphite expressed by the formula [(CH 3 ) 3 Si(CH 2 ) 3 O] 3 P.
Claim 9
Dependent Claim
19 words
Tris(n-butyldimethylsilylmethyl) phosphite expressed by the formula [(n-C 4 H 9 )(CH 3 ) 2 SiCH 2 O] 3 P.
Claim 10
Dependent Claim
19 words
Tris(n-butyldimethylsilylmethyl) phosphite expressed by the formula [(n-C 4 H 9 )(CH 3 ) 2 SiCH 2 O] 3 P.
Claim 11
Independent Claim
77 words
A method for the preparation of a tris(triorganosilylalkyl) phosphite represented by the general formula [R 3 Si(CH 2 ) n O] 3 P where R is a substituted or unsubstituted monovalent hydrocarbon group and n is a positive integer, which comprises subjecting a triorganosilylalkanol represented by the general formula R 3 Si(CH 2 ) n OH where R and n are as defined above, and phosphorus trichloride to dehydrochlorination reaction in the presence of a tertiary amine.
Claim 12
Independent Claim
77 words
A method for the preparation of a tris(triorganosilylalkyl) phosphite represented by the general formula [R 3 Si(CH 2 ) n O] 3 P where R is a substituted or unsubstituted monovalent hydrocarbon group and n is a positive integer, which comprises subjecting a triorganosilylalkanol represented by the general formula R 3 Si(CH 2 ) n OH where R and n are as defined above, and phosphorus trichloride to dehydrochlorination reaction in the presence of a tertiary amine.
Claim 13
Dependent Claim
14 words
The method as claimed in claim 7 wherein the tertiary amine is a trialkylamine.
Claim 14
Dependent Claim
12 words
The method as claimed in claim 8 wherein the trialkylamine is triethylamine.
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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |