65527-61-9Relevant articles and documents
Stereochemical and NMR Reassignment of 6-Norlysergic Acid Diethylamide and 6-Nor-6-allyllysergic Acid Diethylamide
Stachulski, Andrew V.,Nichols, David E.,Scheinmann, Feodor
, p. 30 - 31 (2007/10/03)
Conditions are described for the preparation of a salt of 8β-norlysergic acid diethylamide (8β-nor-LSD) 1 as a single epimer from cyanamide 3, whereas earlier preparations gave mixtures of 1 with the 8α epimer 4 in variable proportions: the earlier NMR assignment of 1 is amended and the N(6) alkylation of 1 and 4 with allyl bromide is discussed.
Synthesis and LSD-like discriminative stimulus properties in a series of N(6)-alkyl norlysergic acid N,N-diethylamide derivatives
Hoffman,Nichols
, p. 1252 - 1255 (2007/10/02)
A convenient method for the synthesis of N(6)-alkyl norlysergic acid N,N-diethylamide derivatives was developed. A series of these compounds was synthesized and tested for substitution in the two-lever drug discrimination assay, in rats trained to discriminate injections of d-LSD tartrate (185.5 nmol/kg, ip) from saline. A dose-response curve for each of the compounds in the series was generated. Structure-activity relationships were developed, based on comparison of the estimated ED50 values from these curves. Of the compounds that substituted for LSD, the N(6)-ethyl and -allyl were approximately 2-3 times more potent than LSD itself. The N(6)-propyl was equipotent to LSD, while the isopropyl derivative was half as active. The n-butyl compound was 1 order of magnitude less potent than LSD, suggesting a similarity to the SAR of certain serotonin and dopamine agonists. By contrast, no generalization occurred to norlysergic acid N,N-diethylamide and the N(6)-2-phenethyl derivative.