Process of production of 4-substituted-3-halogeno-1,4-benzoxazepine derivative and salts thereof
US6114522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1999 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Nov 24, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65583
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing 4-substituted-3-halogeno-1,4-benzoxazepin derivative or the salt thereof comprising: deprotonizing a benzoxazepine derivative having the formula (II): ##STR1## with a base; and then, reacting the deprotonized product with a phosphate halide to produce an intermediate having the formula (IV): ##STR2## and then, reacting the resultant intermediate (IV) with a reagent selected from (i) a complex of a phosphine with chlorine or bromine, (ii) a phosphine and a chlorine gas or liquid bromine, (iii) a phosphine and tetrachloromethane or tetrabromomethane, or (iv) a halogenated phosphite ester to produce a 4-substituted-3-halogeno-1,4-benzoxazepine derivative having the formula (I) ##STR3## wherein X indicates a chlorine atom or a bromine atom, or its salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.