Method for preparing lactames, comprising a photonitrosation step, followed by a Beckmann transposition step
US9499481B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Apr 14, 2014 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Apr 14, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a method for preparing lactames, according to which a photonitrosation of a cycloalkane is carried out using nitrosyl chloride (NOCI). According to the invention, said photonitrosation is carried out by means of LEDs emitting a monochromatic light. The method according to the invention can also include a step comprising Beckmann transposition/dechlorination of the oxime hydrochloride generated during said phonitrosation, preferably carried out in a glass microreactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.