home *** CD-ROM | disk | FTP | other *** search
- From: sknight@tartarus.uwa.edu.au (Sam Knight)
- Newsgroups: alt.psychoactives
- Subject: Re: LSD analogues (was re: ALD-52)
- Date: 3 Oct 1994 12:33:28 GMT
- Message-ID: <36otmo$jfn@styx.uwa.edu.au>
-
- Christopher Hemming (CJHEMMIN@SCIENCE.watstar.uwaterloo.ca) wrote:
- : While we're on the subject of LSD analogues, I understand that replacing
- : the methyl group on nitrogen 6 with ethyl, allyl or propyl results in
- : compounds of similar, or even higher (by a factor of 2-3) potency. Is
- : this right? I'm pretty sure I've actually looked up the paper, but of
- : course it was just a glance at it. So, is that right?
-
- I have seen that too. The reference was posted along with a reference to
- the JACS article on sythesis of lysergic acid methyl ester from L-tryptophan
- and some article on the synthesis of LSD from LSA using POCl3.
- I think the post is available for FTP.
-
- : I find it interesting that the LSD molecule is so sensitive to substitution.
- : There aren't many substitutions that will retain activity (just a couple
- : of types, as compared with the psychedelic phenethylamine family where you
- : can do just tons of stuff). It must be fitting into that receptor pocket
- : really nicely. Especially the diethylamine group. I understand just
- : about any other substitution pattern there pretty much abolishes activity.
- : Hmm. I wonder if you replaced some of the -H's on those two ethyl groups
- : with -F's... That would keep the size about the same, but would change the
- : charge distribution. Has it been tried? -F for -H is supposed to be a
- : fun substitution in bioactive molecules, often modifying activity since
- : it's the same size (roughly) as -H, but is a lot harder for enzymes to
- : take off. Apparently monofluoroacetic acid is one of the most generally
- : toxic substances known (i.e. bad for most life forms) because it gets into
- : some important pathway (related to carbon oxidation, Kreb's cycle?) and
- : totally fucks it all to hell.
-
- There are other LS amides that _are_ active at dosages <20x that of
- LSD including ALD-52, d-LS morpholide (20% LSD activity), 1-N-methyl LSD
- (40% activity), d-LS dimethylamide (10%), d-LS ethylamide (5%) and
- d-(1-N-methyl-LS-pyrrolidide) (7%)
- I think research into fluroLSDs has been a bit limited (I certainly
- havent seen any in my wandering, and it being a fairly notorious
- sheduled drug must put a bit of a damper on human trials..)
- It is, however, a good idea..
- Does anyone have information on the breakdown path of LSD, I think
- it is metabolised by MAO. Certainly MAOIs increase LSD potency.
-
- : Also, -Cl lies somewhere between -H and -CH3 in size (or so I'm told) so
- : making of the ethyl groups a 2-chloroethyl group wouldn't be quite as
- : bad size-wise as making it a propyl group (which apparently abolishes
- : activity). Of course, 2-chloroethyl ethyl amine would polymerize/cyclize
- : nicely. Maybe it wouldn't be too easy to work with, so a different
-
- sure looks that way..
-
- : synthesis might be required rather than just using a different amine in
- : the amidation step. But I don't really know what I'm talking about, I'm
- : just throwing out ideas.
-
- you and me both :)
-
-
- : ------------------------------------------------------------------------------
- : FIRST CHURCH OF CHRIS ORGANIC CHEMIST
- : Waterloo, Ont.
- : Better living through chemistry -- For every problem, a chemical solution.
- :
-
- Sam
-
-
-
-