Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1998050334) PRODUCTION OF BROMINATED METHOXYNAPHTHALENE COMPOUNDS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/050334 International Application No.: PCT/US1998/006995
Publication Date: 12.11.1998 International Filing Date: 07.04.1998
Chapter 2 Demand Filed: 03.12.1998
IPC:
C07C 41/22 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
41
Preparation of ethers; Preparation of compounds having groups, groups or groups
01
Preparation of ethers
18
by reactions not forming ether-oxygen bonds
22
by introduction of halogen; by substitution of halogen atoms by other halogen atoms
Applicants:
ALBEMARLE CORPORATION [US/US]; 451 Florida Street Baton Rouge, LA 70801-1765, US
Inventors:
SABAHI, Mahmood; US
Agent:
PIPPENGER, Philip, M. ; Albemarle Corporation Patent & Trademark Division 451 Florida Street Baton Rouge, LA 70801-1765, US
Priority Data:
08/854,13108.05.1997US
Title (EN) PRODUCTION OF BROMINATED METHOXYNAPHTHALENE COMPOUNDS
(FR) PRODUCTION DE COMPOSES METHOXYNAPHTHALENES BROMES
Abstract:
(EN) Bromine is generated $i(in situ) in a mixture formed by mixing together 2-methoxynaphthalene, hydrogen bromide, at least one peroxidic compound and a chemically indifferent organic liquid solvent or diluent under conditions effective to produce 1,6-dibromo-2-methoxynaphthalene. Optionally, but preferably, water is also included in the mixture. Regioselective hydrodebromination of 1,6-dibromo-2-methoxynaphthalene with hydrogen and tungsten carbide enables production of 2-bromo-6-methoxynaphthalene.
(FR) La présente invention se rapporte à du brome obtenu $i(in situ) dans un mélange renfermant 2-méthoxynaphthalène, du brome d'hydrogène, au moins un composé peroxyde et un solvant ou un diluant liquide organique chimiquement indifférent, dans des conditions efficaces permettant de produire 1, 6-dibromo-2-méthoxynaphtalène. Il est également possible et même préférable de rajouter de l'eau à ce mélange. Ainsi, l'hydrodébromation régiosélective de 1, 6-dibromo-2-méthoxynaphthalène avec de l'hydrogène et du carbure de Tungstène permet d'obtenir 2-bromo-6-méthoxynaphtalène.
Designated States: CA, JP
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)