54080-21-6Relevant articles and documents
Binding of spiperone analogs at 5-HT(2A) serotonin receptors
Khorana, Nantaka,Bondarev, Mikhail,Dukat, Malgorzata,Herrick-Davis, Katharine,Egan, Christina,DuPre, Ann,Smith, Carol,Teitler, Milt,Glennon, Richard A.
, p. 657 - 667 (2007/10/03)
Although spiperone displays good selectivity for 5-HT(2A) versus 5- HT(2C) serotonin receptors, it suffers from high affinity for 5-HT(1A) and dopamine D2 receptors. In order to determine a) the contribution of various structural features to 5-HT(2A) affinity, and b) if spiperone binds in a manner comparable to that of the 5-HT2 antagonist ketanserin, several abbreviated analogs of spiperone were prepared and examined. Removal of the spiperone fluoro group enhances 5-HT(2A) affinity several-fold, but does not improve its selectivity. The butyrophenone carbonyl group is not a major contributor to binding, but removal of the triazaspirodecanone carbonyl group reduces affinity at all receptor populations by about 100-fold. For a series of spiperone analogs, a three- to four-atom chain seems optimal for 5-HT(2A) affinity. On the basis of the structure-activity findings, it is concluded that ketanserin and spiperone likely bind at 5-HT(2A) receptors in a dissimilar manner.