adder
Bluelighter
- Joined
- Mar 28, 2006
- Messages
- 2,851
The reason for chloro group on ortho position is its electron withdrawing properties, it makes the compound have less psychotropic properties (ketamine vs. tiletamine that has 2-thienyl group instead of phenyl and no electron withdrawing group, if whoever has taken tiletamine, he/she knows it's not really a light drug). Like I previously wrote you can count electronegativity of a functional group, methoxy seems like a good substitute for chlorine regarding both electronegativity and size. Also again, I have taken 2-methoxydeschloroketamine - it's not a wonder drug (although I understand why some are so excited - legal ketamine substitute might show up!).
Placing a carbonyl group on position 2 has already been explained. Easier metabolism leads to decreased half-life and easier excretion. It does change drug affinities at different sites, that's SAR. 2-carbonyl compounds have greater affinity to opioid receptors than compounds with nothing there.
There was some site explaining it all in a simple language but I don't have the address and I don't know if it's still up (well, I noticed such sites often disappear...).
Placing a carbonyl group on position 2 has already been explained. Easier metabolism leads to decreased half-life and easier excretion. It does change drug affinities at different sites, that's SAR. 2-carbonyl compounds have greater affinity to opioid receptors than compounds with nothing there.
There was some site explaining it all in a simple language but I don't have the address and I don't know if it's still up (well, I noticed such sites often disappear...).