[EN] PROCESSES FOR THE PRODUCTION OF 14 - OXYGENATED MORPHINAN - 6 - ONES<br/>[FR] PROCÉDÉS POUR LA PRODUCTION DE 14-(MORPHINANE OXYGÉNÉ)-6-ONES
申请人:UNIV INNSBRUCK
公开号:WO2012013671A1
公开(公告)日:2012-02-02
A process for the production of a 14-oxygenated morphinan-6-one of formula (I) wherein R1 is alkyl, alkenyl, alkynyl, cycloalkylalkyl, aralkyl, R3 is hydrogen, and R4 is hydrogen, wherein oripavine, 14-hydroxymorphinone or oxymorphone is used as starting material.
Process for the synthesis of 14-oxygenated morphinan-6-ones
申请人:Universität Innsbruck
公开号:EP2420503A1
公开(公告)日:2012-02-22
A process for the production of 14-oxygenated morphinan-6-ones wherein a methylether group in position 3 of the phenyl ring which has to be cleaved to obtain the hydroxy group, and wherein the protection of the hydroxy group in position 3 of the phenyl ring in the presence of a ketal group is avoided.
METHOD FOR THE N-DEMETHYLATION OF N-METHYL HETEROCYCLES
申请人:Scammells Peter John
公开号:US20120226043A1
公开(公告)日:2012-09-06
The present invention provides methods of N-demethylating, N-methylated heterocycles and N-methyl, N-oxide heterocycles using a transition metal with an oxidation state of zero, ferrocene or substituted derivatives thereof, or Cr
3+
. N-demethylated heterocycles prepared by the methods of the present invention are also provided.
A process for purifying plant extracts which consist essentially of noroxymorphone compounds and which comprise, as impurities, α,β-unsaturated noroxymorphone compounds, by (a) converting the plant extract or the product of a subsequent stage in the synthesis of a selected noroxymorphone compound in a reaction which converts the hydroxyl groups present in the mixture to leaving groups of the formula —OR
2
in which R
2
is the introduced radical of the leaving group, (b) these leaving groups are optionally detached again, then (c) the resulting mixture is subjected to a selective hydrogenation, so that a saturated bond is formed in the α,β-position of the unsaturated noroxymorphone compounds and any remaining leaving groups are each converted to a hydroxyl group and then optionally (d) the pure noroxymorphone compound is isolated; processing of the noroxymorphone purified in this way to naltrexone or naloxone or a salt of these compounds or a quaternary derivative of these compounds; pharmaceutical formulations comprising such a compound.