N&PD Moderators: Skorpio | someguyontheinternet
Ah yes, my good ol' buddy of the Mà Huà ng persuasion.![]()
DOUBLE_DEXTER_FINN_AGAIN
(1S,2S)-1-phenyl-1-carbomethoxy-2-methylaminopropane
from
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(1R,2S)-1-phenyl-1-hydroxy-2-methylaminopropane
Yes, starting from the (1R,2S)-configuration, the hydroxyl group is converted to a leaving group, such as a mesylate or tosylate. But it's switched back during the second substitution that reacts the resulting compound from the first step with… well I guess something like, α-methoxyacetyl chloride, introducing the carbomethoxy group, no? I'm speculating on the synthetic route a bit here.Actually, I think the hydroxyl group may switch around the stereochemistry of the one spot after it undergoes a substitution reaction.
Pseudoefffffffiiiiii mean pseudomà huà ng, IIRC. Hmm, I'm reminded of PPA and Aminorex synthesis at the moment.Anyway, if that is the case, then this is the correct precursor:
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(1S,2S)-1-phenyl-1-hydroxy-2-methylaminopropane
Right? That's how I see it, too. One would start from the (1R,2S) config, and not the pseudo one, (1S,2S).BUT it undergoes 2 substitution reactions, so the former would be correct.
Forgive me for being pedantic and splitting hairs a bit here… The pair of enantiomers with the stereochemistry (1R,2S) and (1S,2R) is traditionally designated "ephedrine", while the pair of enantiomers with the stereochemistry (1R,2R) and (1S,2S) is called "pseudoephedrine". I know you know this already, but I figured it would hurt to post as a reminder to anyone reading this thread… who probs know it too, but … it's in the interests of science and, by extension perhaps if not directly, harm reduction.Errg, Forget Stereochemistry! All I Know Is That Ephedrine Comes In 4 Stereochemicals, And One Of Them Is Correct. Specifically, It Has A (2S).
Probably weak as a stimulant, you're saying, right? And yeah I can't imagine that n-substituted ethylhydroxy bond would do much to help w/potency or even perceptible activity without super high/dangerous doses.![]()
ALCOHOLIC_AMPHETAMINE
N-(2-hydroxyethyl)-1-phenyl-2-aminopropane
Probably weak. I don't know.