US4064153A
Expired / Lapsed
US
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Oligomer N-alkyl-iminoalanes and process for the preparation thereof
Assignee: SnamProgetti SpA
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Filing: 1975-07-01
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Granted: 1977-12-20
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Expires: 1995-07-01
Abstract
Abstract An oligomer N-alkyl-iminoalane, made up of a plurality of four and/or six member rings of the formulae: ##STR1## wherein R is an aliphatic, cycloaliphatic or aromatic hydrocarbon combined in a tridimensional cage structure having the chemical composition (HAl-NR) n , in which R has the above meaning and n is a whole number lower than or equal to 10, is prepared by reacting a primary amine containing a secondary or tertiary carbon atom in alpha or beta position with respect to the amine nitrogen atom or amide derivative thereof wherein the amine radical contains a secondary or tertiary carbon atom in alpha or beta position with respect to the nitrogen atom with a complex formed by AlH 3 and a Lewis base, or by reacting said primary amine with an alkali or alkaline-earth metal alanate.
Inventors
- 👤 Salvatore Cucinella
- 👤 Marco Cesari
- 👤 Tito Salvatori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:45
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/069
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
An oligomer N-alkyl-iminoalane consisting of a plurality of four and/or six membered rings of the formula: ##STR3## in which R is selected from the group consisting of iso-propyl, sec-butyl, iso-butyl, tert-butyl and cyclo-butyl, combined to form a tridimensional cage structure having the chemical composition (HAlNR) n in which R has the meaning given above, and n is a whole number lower than or equal to 10.
Claim 2
Dependent Claim
66 words
An oligomer N-alkyl-iminoalane consisting of a plurality of four and/or six membered rings of the formula: ##STR3## in which R is selected from the group consisting of iso-propyl, sec-butyl, iso-butyl, tert-butyl and cyclo-butyl, combined to form a tridimensional cage structure having the chemical composition (HAlNR) n in which R has the meaning given above, and n is a whole number lower than or equal to 10.
Claim 3
Dependent Claim
42 words
The process of preparing an oligomer N-alkyliminoanale as claimed in claim 1, which consists of reacting a primary amine selected from the group consisting of iso-propyl-amine, sec-butyl-amine, iso-butyl-amine, tert-butyl-amine, and cyclo-butyl-amine, with a complex formed by AlH 3 and a Lewis base.
Claim 4
Dependent Claim
34 words
The process of preparing an iminolane as claimed in claim 1, which consists in reacting an alkali alanate with a primary amine selected from the group consisting of iso-propyl-amine, sec-butyl-amine, iso-butyl-amine, tert-butyl-amine, and cyclo-butyl-amine.
Claim 5
Dependent Claim
46 words
The process of preparing an oligomer N-alkyl-iminoalane as claimed in claim 1 wherein the reaction is carried out in the presence of a member of the group consisting of the hydrocarbon solvents, ether solvents and solvents containing no functional group able to react with hydride hydrogen.
Claim 6
Dependent Claim
34 words
The process of preparing an oligomer N-alkyl-iminoalane as claimed in claim 1, wherein the reaction is carried out in the temperature range of from -20° C to the dissociation temperature of said oligomer N-alkyl-iminolane.
Claim 7
Dependent Claim
33 words
The process of preparing an oligomer N-alkyl-iminoalane as claimed in claim 4, wherein the reaction is carried out at the boiling temperature of the solvent for a period of at least 20 hours.
Claim 8
Dependent Claim
46 words
The process of preparing an oligomer N-alkyl-iminoalane as claimed in claim 4, wherein the reaction is carried out by replacing the reaction solvent with a higher boiling solvent and heating the reaction mixture to the boiling temperature thereof for a period of at least 20 hours.
Claim 9
Dependent Claim
18 words
The process as claimed in claim 3, wherein the alkali alanate is NaAlH 4 or LiAlH 4 .
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |