Novel 5-Hydroxytryptamine 4 (5-HT4) Receptor Agonists. Synthesis and Gastroprokinetic Activity of 4-Amino-N (2-(1-aminocycloalkan-1-yl)ethyl)-5-chloro-2 methoxybenzamides.
作者:Takeshi SUZUKI、Naoki IMANISHI、Hirotsune ITAHANA、Susumu WATANUKI、Keiji MIYATA、Mitsuaki OHTA、Hideaki NAKAHARA、Yoko YAMAGIWA、Toshiyasu MASE
DOI:10.1248/cpb.46.1116
日期:——
A novel series of 4-amino-N-[2-(1-aminocycloalkan-1-yl)ethyl]-5-chloro-2-methoxybenzamide derivatives (1), which had amines conformationally restricted due to the effect of repulsion by neighboring substituents, were prepared and evaluated for 5-hydroxytryptamine 4 (5-HT4) agonistic activities by using the contraction of longitudinal muscle myenteric plexus (LMMP) of guinea pig ileum. One of the most potent compounds in this series was 4-amino-5-chloro-N-[2-(1-dimethylamino-1-cyclohexyl)ethyl]-2-methoxybenzamide (1c, YM-47813) with an EC<50> value of 1.0 μM on LMMP. This compound effectively enhanced gastric motility and gastric emptying in conscious dogs by oral administration (1-3 mg/kg).
Synthesis of Novel Restricted Diamines; 2-(1 -Aminocycloalkan-1-YL)ethylamines
作者:Takeshi Suzuki、Naoki Imanishi、Hirotsune Itahana、Susumu Watanuki、Mitsuaki Ohta、Toshiyasu Mase
DOI:10.1080/00397919808005943
日期:1998.2
Abstract Novel restricted diamines, 2-(1-aminocycloalkan-1-yl)ethylamines 1, were prepared by using Michael addition of ethyl cyclohexylideneacetate 2 and cycloalkylideneacetonitriles 7 with amines. In Michael addition, ester 2 needed high reaction temperature and gave several products, whereas 7 reacted smoothly and gave 2-(1-amino-1-cyclohexyl)acetonitriles 8 in good yield (NH3 85%, MeNH2 89% EtNH2