GB225824A - A process for the preparation of dihydrocodeinone from thebaine - Google Patents

A process for the preparation of dihydrocodeinone from thebaine

Info

Publication number
GB225824A
GB225824A GB23835/24A GB2383524A GB225824A GB 225824 A GB225824 A GB 225824A GB 23835/24 A GB23835/24 A GB 23835/24A GB 2383524 A GB2383524 A GB 2383524A GB 225824 A GB225824 A GB 225824A
Authority
GB
United Kingdom
Prior art keywords
thebaine
hydrogen
dihydrocodeinone
palladium
black
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB23835/24A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knoll & Co
Original Assignee
Knoll & Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Knoll & Co filed Critical Knoll & Co
Publication of GB225824A publication Critical patent/GB225824A/en
Expired legal-status Critical Current

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  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

Dihydrocodeinone is prepared by treating thebaine with hydrogen in the presence of an acid and of a comparatively large amount of a catalyst, such as platinum or palladium (preferably in the form of "black") or their salts. According to the example, thebaine is dissolved in hydrochloric acid, about 5 per cent of palladium black is added, and the whole then agitated with hydrogen at ordinary temperature; the product is precipitated with alkali and crystallized from alcohol.ALSO:Dihydrocodeinone is prepared by treating thebaine with hydrogen in the presence of an acid and of a comparatively large amount of a catalyst, such as platinum or palladium (preferably in the form of "black") or their salts. According to the example, thebaine is dissolved in hydrochloric acid, about 5 per cent of palladium black is added, and the whole then agitated with hydrogen at ordinary temperature; the product is precipitated with alkali and crystallized from alcohol.
GB23835/24A 1923-12-07 1924-10-08 A process for the preparation of dihydrocodeinone from thebaine Expired GB225824A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE225824X 1923-12-07

Publications (1)

Publication Number Publication Date
GB225824A true GB225824A (en) 1925-06-04

Family

ID=5862920

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23835/24A Expired GB225824A (en) 1923-12-07 1924-10-08 A process for the preparation of dihydrocodeinone from thebaine

Country Status (1)

Country Link
GB (1) GB225824A (en)

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