Process for production of DFMB derivatives
US9458119B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Feb 20, 2012 |
| Grant date | Oct 4, 2016 |
| Priority date | — |
| Expiry date | May 22, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D263/56
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of a compound of formula (III) which comprises a step of reacting a compound of formula (I) with an excess amount of a compound of formula (II) in absence of aromatic solvent,wherein n is 0, 1, 2, 3 or 4; X is NH, O or S; each R1 group may be the same or different, and is independently selected from the group consisting of hydrogen, hydroxyl, alkoxy, alkyl, carbonyl, carboxyl, carboxylic acid ester, amido, cyano, halogenated aliphatic, nitro, and amino; and R2 group is selected from the group consisting of hydroxyl, Cl, F, Br, amino, and alkoxy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.