| Title of Invention | A PROCESS FOR THE MANUFACTURE OF A CAROTENOID BY WITTING REACTION |
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| Abstract | A process for the manufacture of a carotenoid by Wittig reaction comprising reacting a C<SUB>10</SUB>-dial such as herein described and triaryl phosphonium chloride, bromide or acetate having substituents as herein described in a polar reaction medium such as herein described, which is a polar, toxicologically unobjectionable solvent or solvent mixture which remains monophasic on the addition of water in an amount upto 30 vol. % to pemlit the triaryJphosphine oxide formed during said reaction to dissolve wen, said polar solvent being selected such that all the reactant and dle thus manufactured carotenoid dissolve therein upto a maximum of 10% by weight, and recovering said carotenoid from the reaction medium in a manner known perse. |
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2064-mas-1998 claims granted.pdf
2064-mas-1998 correspondence others.pdf
2064-mas-1998 description (complete) granted.pdf
2064-mas-1998 power of attorney.pdf
| Patent Number | 187813 | ||||||||||||
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| Indian Patent Application Number | 2064/MAS/1998 | ||||||||||||
| PG Journal Number | 30/2009 | ||||||||||||
| Publication Date | 24-Jul-2009 | ||||||||||||
| Grant Date | 10-Jan-2003 | ||||||||||||
| Date of Filing | 14-Sep-1998 | ||||||||||||
| Name of Patentee | M/S. F HOFFMANN-LA ROCHE AG | ||||||||||||
| Applicant Address | 124 GRENZACHERSTRASSE, CH-4070 BASLE | ||||||||||||
Inventors:
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| PCT International Classification Number | C07C175/00 | ||||||||||||
| PCT International Application Number | N/A | ||||||||||||
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PCT Conventions:
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