Targeted drug rescue with novel compositions, combinations, and methods thereof
A composition and compound technology, which is applied in the direction of drug combination, pharmaceutical formula, medical preparations containing active ingredients, etc., can solve the problem of disease-modifying therapy that has not yet been obtained
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[0459] The preparation of enantiomerically pure molecules of biological interest can be efficiently achieved by asymmetric synthesis. This method involves the creation of one or more chiral centers from prochiral starting materials under the influence of a chiral host. The preparation of enantiomerically pure compounds involves the use of chiral auxiliaries, chiral reagents or catalysts, or combinations thereof.
[0460] In another example, compounds of the present disclosure can be prepared from (2R)-3-(dimethylamino)2-propanediol and (2S)-3-(dimethylamino)-1,2-propanediol (Scheme VIII )preparation.
[0461] A variety of versatile and convenient chiral carboxylic acid ligands can be found in the literature, such as mandelic acid, 2-methylmandelic acid, 2-chloromandelic acid, 3-chloromandelic acid, 4-methoxymandelic acid , O-acetyl mandelic acid, α-methoxyphenylacetic acid, malic acid, tartaric acid, etc. Chiral ligands can be prepared from readily available building blocks...
example 1
[0536] Example 1: Dextromethorphan has been synthesized from benzylisoquinoline (with a planar structure) by Grignard cyclization (Grewe'scyclization), giving the corresponding morphinan, wherein the 1,2,3,4,5 , 6,7,8-octahydro-1-(4-methoxybenzyl) isoquinoline is converted into N-formyl derivatives, crystallized into N-formyl morphinan, and the formyl group is reduced to N- Methyl, given 3-methoxy-17-methylmorphinan. Dextromethorphan is readily soluble in 96% ethanol and essentially insoluble in water. Dextromethorphan can be chlorobromide monohydrate or bound to a polystyrenesulfonic acid-based ion exchange resin. The specific optical rotation of dextromethorphan in water is +27.6° (20°C, sodium D-line).
example 2
[0537] Example 2: Equimolar amounts of sagrelate (429.506 g / mol) and dextromethorphan (271.40 g / mol) were mixed in a suitable solvent, stirred and allowed to crystallize. The compound of formula I and the dextromethorphan cation will form hydrogen bonds to form a complex and crystallize.
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