Method for the synthesis of N-(phosphonomethyl)glycine
US9150599B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2013 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Jul 17, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N59/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for the synthesis of N-(phosphonomethyl) glycine or one of its derivatives selected from the group of its salts, its phosphonate esters and its phosphonate ester salts, including the steps of: a) forming a reaction mixture having an acid catalyst, N,N′-bis(carboxymethyl)-2,5-diketopiperazine and a compound having one or more P—O—P anhydride moieties, wherein the moieties have one P atom at the oxidation state (+III) and the other P atom at the oxidation state (+III) or (+V), to form N,N′-bis(phosphonomethyl)-2,5-diketopiperazine, its dehydrated forms or their phosphonate esters; b) hydrolyzing the reaction mixture to form N-(phosphonomethyl)glycine or one of its derivatives selected from the group consisting of its salts, its phosphonate esters and its phosphonate ester salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.