High purity formulations of highly substituted lithium amide bases
US5726308A · kind A · utility
5Cited by
4References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 22, 1996 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Mar 22, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F1/005
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing high purity solutions of highly substituted lithium amide bases by direct reaction of lithium metal with highly substituted amine bases alone or in an ether solvent, a hydrocarbon solvent or in a mixed ether/hydrocarbon solvent mixture, optionally in the presence of a catalyst selected from tin salts and transition metal salts of Groups 4B, 5B, 6B, 7B, and 8 of the Periodic Table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.