Methods for producing hydrocodone, hydromorphone or a derivative thereof
View Patent ↗The present disclosure generally relates to methods for producing opioid derivatives. More particularly, the present disclosure relates to the preparation of hydromorphone, hydrocodone, or a derivative thereof, by means of a non-catalytic hydrogenation reaction of thebaine, oripavine or a derivative thereof, respectively, using a hydrazide reagent, followed by hydrolysis of the hydrogenated intermediate at a low temperature and for a short period of time. Additionally, the present disclosure relates to a composition comprising the desired hydromorphone, hydrocodone, or a derivative thereof, in combination with a 6-beta compound that is structurally related thereto.
1. A method for preparing a compound of Formula III from a compound of Formula I:
the method comprising contacting the compound of Formula I and a hydrazide reagent of Formula II in a first reaction mixture for at least 6 hours, to convert the compound of Formula I to the compound of Formula III, wherein:
R 1 is selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted allyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl alkyl, substituted or unsubstituted aryl sulfonyl, substituted or unsubstituted alkyl sulfonyl, substituted or unsubstituted acyl, substituted or unsubstituted formyl, hydroxyl, substituted or unsubstituted carboxyester, and substituted or unsubstituted carboxyamide;
R 2 is selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl alkyl, substituted or unsubstituted acyl, substituted or unsubstituted aryl sulfonyl, substituted or unsubstituted alkyl sulfonyl, substituted or unsubstituted carboxyester, substituted or unsubstituted carboxyamide, substituted or unsubstituted trialkylsilyl, substituted or unsubstituted heterocycloalkyl;
R 3 is selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl alkyl, substituted or unsubstituted acyl, substituted or unsubstituted aryl sulfonyl, substituted or unsubstituted alkyl sulfonyl, substituted or unsubstituted carboxyester, substituted or unsubstituted carboxyamide, substituted or unsubstituted trialkylsilyl, substituted or unsubstituted heterocycloalkyl;
R 8 and R 9 are independently selected from the group consisting of hydrogen, hydroxyl, and substituted or unsubstituted hydrocarbyl, or R 8 and R 9 together form a carbonyl group;
R 10 , R 11 , R 14 and R 15 are independently selected from the group consisting of hydrogen, substituted and unsubstituted hydrocarbyl, and a halogen, or R 14 and R 15 together form a carbonyl group;
R 16 is selected from the group consisting of hydrogen, and substituted or unsubstituted hydrocarbyl; and,
R 18 is either an acyl group having the formula R 19 —C(O)— or a sulfonyl group having the formula R 20 —S(O) 2 —, wherein R 19 and R 20 are independently selected from the group consisting of H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heterocycloalkyl, and substituted or unsubstituted heteroaryl.
2. The method of claim 1 , wherein the compounds of Formula I and Formula II are contacted for less than about 24 hours in the first reaction mixture.
3. The method of claim 1 , wherein the compound of Formula I is converted to the compound of Formula III in the absence of a metal-containing catalyst.
4. The method of claim 1 , wherein the first reaction mixture contains the compound of Formula II and the compound of Formula I in a ratio of between about 2:1 and about 4:1.
5. The method of claim 1 , wherein the reaction is carried out to convert the compound of Formula IA to the compound of Formula IIIA:
6. The method of claim 1 , wherein the reaction is carried out to convert the compound of Formula IB to the compound of Formula IIIB:
7. The method of claim 1 , wherein the compound of Formula II is selected from 2,4,6-triisopropylbenzene sulphonyl hydrazide and p-toluene sulphonyl hydrazide.
8. The method of claim 1 , further comprising preparing the compound of Formula VI from the compound of Formula III:
the method comprising contacting the compound of Formula III and an acid in a second reaction mixture at a temperature of less than 50° C., to convert the compound of Formula III to the compound of Formula VI, wherein: R 1 , R 2 , R 3 , R 8 , R 9 , R 10 , R 11 , R 14 , R 15 , R 16 are as previously defined in claim 1 , and R 17 is hydrogen.
9. The method of claim 8 , wherein the compound of Formula III and the acid are contacted in the second reaction mixture at about room temperature.
10. The method of claim 8 , wherein the compound of Formula III and the acid are contacted in the second reaction mixture for between about 0.5 hours and about 3 hours.
11. The method of claim 8 , further comprising contacting the compound of Formula VI with a base to give the free base of the compound of Formula VI.
12. The method of claim 8 , further comprising recrystallizing the compound of Formula VI to reduce the concentration of an impurity therein having a Formula 6-beta:
wherein: R 1 , R 2 , R 3 , R 8 , R 9 , R 10 , R 11 , R 14 , R 15 , R 16 and R 17 are as previously defined in claim 8 , to less than 0.15 wt %.