Journal
ACS MEDICINAL CHEMISTRY LETTERS
Volume 8, Issue 1, Pages 133-137Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmedchemlett.6b00471
Keywords
alpha 7 nAChR; schizophrenia; novel object recognition; quinuclidine
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We describe the synthesis of quinuclidine-containing spiroimidates and their utility as alpha 7 nicotinic acetylcholine receptor (nAChR) partial agonists. A convergent synthetic route allowed for rapid SAR investigation and provided a diverse set of fused 6,5-heteroaryl analogs. Two potent and selective a7 nAChR partial agonists, (1'S,3'R,4'S)-N-(7-bromopyrrolo[2,1-f][1,2,4]triazin-4-yl)-4H-1'-azaspiro[oxazole-5,3'-bicyclo[2.2.2]octan]-2-amine (20) and (1'S,3'R,4'S)-N-(7-chloropyrrolo[2,1-f][1,2,4]triazin-4-yl)-4H-1'-azaspiro[oxazole-5,3'-bicyclo[2.2.2]octan]-2-amine (21), were identified. Both agonists improved cognition in a preclinical rodent model of learning and memory. Additionally, 5-HT3A receptor SAR suggested the presence of a steric site that when engaged led to significant loss of affinity at that receptor.
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