John Dick Tomer

Synthesis and biological activity of putative mono-hydroxylated metabolites of velnacrine

Abstract Ten 9-amino-1,2,3,4-tetrahydroacridinediols were prepared as potential mono -hydroxy metabolites of velnacrine. They were tested for acute toxicity as well as for their ability to inhibit acetylcholinesterase in vitro and to reverse scopolamine-induced memory impairment in mice.

Synthesis and structure-activity relationship of the isoindolinyl benzisoxazolpiperidines as potent, selective, and orally active human dopamine D4 receptor antagonists.

A new class of potent dopamine D4 antagonists was discovered with selectivity over dopamine D2 and the α‐1 adrenoceptor. The lead compound was discovered by screening our compound collection. The structure–activity relationships of substituted isoindoline rings and the chirality about the hydroxymethyl side chain were explored. The isoindoline analogues showed modest differences in potency and selectivity. The S enantiomer proved to be the more potent enantiomer at the D4 receptor. Several analogues with greater than 100‐fold selectivity for D4 over D2 and the α‐1 adrenoreceptor were discovered. Several selective analogues were active in vivo upon oral or intraperitoneal administration. A chiral synthesis starting from either D‐ or L‐O‐benzylserine is also described.