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US4083875A
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Trimethyl phosphinimino dimethyl methylene phosphorane and process for making it
Assignee: Hoechst AG
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Filing: 1976-12-15
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Granted: 1978-04-11
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Expires: 1996-12-15
Abstract
Abstract Trimethyl phosphinimino dimethyl methylene phosphorane of the formula: ##STR1## which is a novel chemical compound is produced. To this end, a tetramethyl phosphonium halide is reacted with 1.1 to 1.5 times the molar quantity of an alkali metal amide in an organic solvent, at 0° to 35° C, with the exclusion of air and moisture, and over a period of 24 to 72 hours. The reaction mixture is freed from residue and subjected to fractional distillation.
Inventors
- 👤 Hubert Schmidbaur
- 👤 Hans-Jurgen Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:02
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/535
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
9 words
Trimethyl phosphinimino dimethyl methylene phosphorane of the formula: ##STR7##
Claim 2
Dependent Claim
9 words
Trimethyl phosphinimino dimethyl methylene phosphorane of the formula: ##STR7##
Claim 3
Dependent Claim
75 words
A process for making trimethyl phosphinimino dimethyl methylene phosphorane as claimed in claim 1, which comprises: reacting a tetramethyl phosphonium halide with 1.1 to 1.5 times the molar quantity of an alkali metal amide in an organic solvent, at temperatures of 0° to 35° C, with the exclusion of air and moisture, and over a period of 24 to 72 hours; removing the reaction mixture from residue and subjecting the reaction mixture to fractional distillation.
Claim 4
Dependent Claim
26 words
A process as claimed in claim 2, wherein the organic solvent is a member selected from the group consisting of tetrahydrofurane, 1,2-dimethoxyethane and tetramethyl ethylene diamine.
Claim 5
Dependent Claim
25 words
A process as claimed in claim 2, wherein the reaction is effected at room temperature and the reaction mixture is intensively stirred during the reaction.
References Cited (Backward Citations)
US3414564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |