50807-67-5Relevant academic research and scientific papers
Preparation method of butorphinol decyclobutyl impurity compound
-
Paragraph 0040; 0042; 0043; 0045, (2021/04/03)
The invention relates to the technical field of organic synthesis, and provides a preparation method of a butorphinol decyclobutyl impurity compound. The preparation of the impurity is always a difficult point in the related technical field, and the preparation of the impurity is not too long in reaction route or too low in yield. The impurity can be simply, conveniently and efficiently synthesized; a compound 1 is catalyzed by strong Lewis acid and reacts with a reducing agent to form a butorphinol decyclobutyl impurity intermediate (compound 2), and the high-purity butorphinol decyclobutyl impurity (compound 4) is obtained through cyclization reaction and demethoxylation reaction without column chromatography purification.
Process for the preparation of 14-hydroxymorphinan derivatives
-
, (2008/06/13)
N-substituted-14-hydroxy-3-substituted-morphinan derivatives have been found to possess potent narcotic agonist or antagonist activity. In particular, the compound 3,14-dihydroxy-N-cyclobutylmethylmorphinan has been found to possess potent agonist/antagonist activity. A new and novel total synthesis for the preparation of these compounds is described herein.
Derivatives of 9,10-dihydroxy-1-(p-alkoxybenzyl)-perhydroisoquinoline oxazine-3-one
-
, (2008/06/13)
The disclosed invention is to a compound of the formula: STR1 in which R2 is lower alkyl. These compounds are useful in the preparation of N-substituted-14-hydroxy-3-substituted morphinan derivatives which have been found to possess potent narcotic agonist or antagonist activity.
Process for the preparation of 14-hydroxymorphinans
-
, (2008/06/13)
N-substituted-14-hydroxy-3-substituted-morphinan derivatives have been found to possess potent narcotic agonist or antagonist activity. In particular, the compound 3,14-dihydroxy-N-cyclopropylmethylmorphinan has been found to possess potent agonist-antagonist activity. A new and more efficient total synthesis for the preparation of these compounds is described herein, which improvement comprises using a Schiff base of 4a-(2-aminoethyl)-1,2,3,4,4a,9-hexahydro-6-methoxyphenanthrene to produce 3-methoxy-9-bromo-norhasubanan hydrobromide in substantially improved yields through the intermediate of the formula SPC1
Oxilorphan and butorphanol. Potent narcotic antagonists and nonaddicting analgesics in the 3,14 dihydroxymorphinan series. Part V
Monkovic,Wong,Pircio,et al.
, p. 3094 - 3102 (2007/10/10)
A series of 3,14 dihydroxymorphinans 8 was synthesized via a method of (a) acylation of 3 methoxy Δ84 morphinan 4a (b) stereospecific epoxidation of the resultant amides to β epoxides 5 (c) simultaneous reduction of amide and epoxide functions and (d) demethylation of the resultant 3 methoxy 14 hydroxymorphinans 7. Alternatively deblocking of the amine function in 5b by hydrolysis followed by reduction of the resultant amino epoxide 5e afforded 14 hydroxy 3 methoxymorphinan 7e, which is readily alkylated and demethylated to give various 8. On a basis of interesting pharmacological profiles compounds l 8c (oxilorphan) and l 8d (butorphanol) were selected for clinical studies.
