Process for the preparation of 7-chloro-1,2,3,4-tetrahydroquinolin-4-one
US4421918A · kind A · utility
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Key dates
| Filing date | Jan 15, 1982 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Jan 15, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D215/233
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of 7-chloro-1,2,3,4-tetrahydroquinolin-4-one by cyclizing 3-m-chloroanilinopropionic acid by means of an oleum, and desulphonating the resulting aromatic sulphonic acids by means of dilute sulphuric acid. The quinolinone product is useful as a starting material for the preparation of pharmaceuticals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.