Method for making organodiphosphites from phosphorochloridites characterized by measuring side-product levels to determine further additions
US9221852B2 · kind B2 · utility
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2References
19Claims
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Key dates
| Filing date | Oct 15, 2012 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Oct 15, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65744
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Claimed is a process for producing a phosphorus-containing ligand, preferably a diphosphite ligand structure (DLS) such as structure I. The method includes contacting a phosphorochloridite (structure II) with a compound having the structure X—OH (which can be a bisaryl compound), and a tertiary organic amine to provide structure I′ and as preferred embodiment structure I.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.