A morphine component, e.g., a concentrate of poppy straw, is converted into codeine in high yield and high purity and in a highly controlled manner. The conversion process involves the following steps: (a) providing a solution or suspension of a morphine component in an inert solvent or a mixture of solvents; (b) methylating the resultant solution or suspension with a methylating agent in the presence of an alkaline ingredient; and (c) recovering the resultant codeine as the free base or as a salt.
[EN] PREPARATION OF 6-KETO, 3-ALKOXY MORPHINANS<br/>[FR] PRÉPARATION DE 6-CÉTO, 3-ALCOXY MORPHINANES
申请人:MALLINCKRODT INC
公开号:WO2010118274A1
公开(公告)日:2010-10-14
The present invention provides processes for the preparation of saturated 6-keto. 3-alkoxy morphinans from unsaturated 6-hydroxy, 3-hydroxy morphinans. In particular, the invention provides processes that utilize catalytic isomerization and alkylation reaclions for the preparation of saturated 6-keto, 3-alkoxy morphinans.
The present invention provides processes for the preparation of saturated 6-keto, 3-alkoxy morphinans from unsaturated 6-hydroxy, 3-hydroxy morphinans, In particular, the invention provides processes that utilize catalytic isomerization and alkylation reactions for the preparation of saturated 6-keto, 3-alkoxy morphinans.
PREPARATION OF METHIONINE OR SELENOMETHIONINE FROM HOMOSERINE VIA A 4-SUBSTITUTED 2-AMINOBUTANOIC ACID INTERMEDIATE
申请人:Lorbert Stephen J.
公开号:US20110224458A1
公开(公告)日:2011-09-15
Provided herein are processes for the production of methionine or selenomethionine from homoserine. In particular, the processes proceed via the production of 4-substituted 2-aminobutanoic acid intermediates or derivatives thereof.
Process for the production of storage-stable polyurethane prepregs and mouldings produced therefrom from dissolved polyurethane composition
申请人:Schmidt Friedrich Georg
公开号:US10029427B2
公开(公告)日:2018-07-24
The invention relates to a method for producing storage-stable polyurethane prepregs and molding bodies produced therefrom (composite components), which can be obtained by a method using a polyurethane composition in solution and by impregnation of fiber-reinforced materials such as of woven fabrics and laid scrim using reactive polyurethane compositions.