US4375548A
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Preparation of trichloromethyl carbinols
Assignee: Dow Chemical Co
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Filing: 1981-12-17
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Granted: 1983-03-01
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Expires: 2001-12-17
Abstract
Abstract Silylated trichloromethyl carbinol compounds are prepared by contacting aldehydes and ketones with silylated trichloroacetates at elevated temperatures in the presence of an initiator.
Inventors
- 👤 Pen-Chung Wang
- 👤 James M. Renga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:01
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/1872; C07F7/1892
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
28 words
A process for preparing siloxy and trichloromethyl functionalized compounds comprising contacting an aldehyde or ketone with a silylated trichloroacetate at elevated temperatures in the presence of an initiator.
Claim 2
Dependent Claim
28 words
A process for preparing siloxy and trichloromethyl functionalized compounds comprising contacting an aldehyde or ketone with a silylated trichloroacetate at elevated temperatures in the presence of an initiator.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein the silylated trichloroacetate is trimethylsilyl trichloroacetate.
Claim 4
Dependent Claim
94 words
A process according to claim 1 wherein the aldehyde or ketone corresponds to the formula: ##STR16## wherein R 1 and R 2 individually are hydrogen or a hydrocarbyl radical of up to about 20 carbons selected from the group consisting of alkyl, alkenyl, aryl, and inertly functionalized derivatives thereof, provided that at least one of R 1 or R 2 is a hydrocarbyl radical; or R 1 and R 2 collectively form a hydrocarbylene moiety of up to about 20 carbons selected from the group consisting of alkylene, alkenylene and inertly functionalized derivatives thereof.
Claim 5
Dependent Claim
41 words
A process according to claim 3 wherein the inert functionality is selected from the group consisting of alkyl, aryl, alkoxy, polyalkoxy, halo, hydroxyl, additional aldehyde or ketone functionality, --OC(O)R 3 and --C(O)OR 3 where R 3 is hydrogen, alkyl or alkenyl.
Claim 6
Dependent Claim
21 words
A process according to claim 1 wherein the initiator comprises either a basic catalyst or a quaternary ammonium or phosphonium compound.
Claim 7
Dependent Claim
31 words
A process according to claim 5 wherein the basic initiator is selected from the group consisting of alkali metal alkoxides, salts of strong bases and weak acids and non-nucleophilic organic bases.
Claim 8
Dependent Claim
17 words
A process according to claim 5 wherein the initiator comprises a basic catalyst and a solubilizing agent.
Claim 9
Dependent Claim
14 words
A process according to claim 7 wherein the solubilizing agent comprises a cyclic polyether.
Claim 10
Dependent Claim
18 words
A process according to claim 1 wherein the temperature is from about 100° C. to about 150° C.
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) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |