113997-50-5Relevant articles and documents
Novel tetrahydro-β-carboline-1-carboxylic acids as inhibitors of mitogen activated protein kinase-activated protein kinase 2 (MK-2)
Trujillo, John I.,Meyers, Marvin J.,Anderson, David R.,Hegde, Shridhar,Mahoney, Matthew W.,Vernier, William F.,Buchler, Ingrid P.,Wu, Kun K.,Yang, Syaluan,Hartmann, Susan J.,Reitz, David B.
, p. 4657 - 4663 (2008/02/13)
A structure-activity relationship study was conducted on a series of tetrahydro-β-carboline-1-carboxylic acid analogs in order to identify the key functionality responsible for activity against the mitogen-activated protein kinase-activated protein kinase 2 enzyme (MK-2). The compounds were further evaluated for their ability to inhibit TNFα production in U937 cells and in vivo. These compounds represent a novel structural class of compounds capable of inhibiting MK-2 with remarkable selectivity.
Synthesis and serotonin receptor affinities of a series of enantiomers of α-methyltryptamines: Evidence for the binding conformation of tryptamines at serotonin 5-HT(1B) receptors
Nichols,Lloyd,Johnson,Hoffman
, p. 1406 - 1412 (2007/10/02)
A procedure for the preparation of optically pure α-methyltryptamines (AMTs) from substituted indoles was developed. The key step in the sequence was the reductive amination of substituted indole-2-propanones with the commercially available pure enantiomers of α-methylbenzylamine, followed by the chromatographic separation of the resulting pair of diastereomeric amines by preparative centrifugal (Chromatotron) chromatography. Catalytic N-debenzylation then afforded the pure AMT enantiomers. Optical purity was established by chiral HPLC analysis of the 2-naphthoylamide derivatives. An improved procedure for the preparation of indole-2-propranone was also developed. To probe structure-activity relationships of serotonin receptors, affinities of the α-methyltryptamine enantiomers were then measured at the 5-HT2 antagonist receptor subtype, with displacement of [3H]ketanserin, and were estimated at the 5-HT(1B) receptor, with displacement of [3H]serotonin, respectively, in rat frontal cortex homogenates. Enantioselectivity at the receptor subtypes varied, depending on aromatic substituents. For a 5-hydroxy or 5-methoxy, the S enantiomer had higher affinity or was equipotent to the R enantiomer. This selectivity at [3H]serotonin binding sites was reversed for 4-oxygenated α-methyltryptamines, where a 4-hydroxy or 4-methoxy did not enhance affinity over the unsubstituted compounds. These results can be explained, for the [3H]serotonin displacement data, if the binding conformation is one where the ethylamine side chain is trans and lying in a plane perpendicular to the indole ring plane.
