Substituted benzamides with conformationally restricted side chains. 1. Quinolizidine derivatives as selective gastric prokinetic agents
作者:Michael S. Hadley、Frank D. King、Brian McRitchie、David H. Turner、Eric A. Watts
DOI:10.1021/jm00150a015
日期:1985.12
ring retain gastric activity. Of these 2-substituted compounds, the 2 alpha, 9a alpha isomer has potentselectivegastricprokinetic activity with only weak dopamine antagonist properties. Spectroscopic data show that the quinolizidine ring preferentially adopts a trans chair-chair conformation with an axial benzamide moiety. However, energy calculations indicate that, at nondopaminergic receptors controlling
Azabicyclic indole esters as potent 5-HT4 receptor antagonists
作者:Paul A. Wyman、Laramie M. Gaster、Frank D. King、Jonathon M. Sutton、Elizabeth S. Ellis、Kay A. Wardle、Timothy J. Young
DOI:10.1016/0968-0896(96)00037-5
日期:1996.2
The synthesis of a series of azabicyclic indole esters is described and their potency reported as 5-HT4 receptorantagonists. Optimization of the most potent compound (19) by preparing the corresponding oxazino[3,2-a]indole ester afforded 34, which had a pIC50 of 9.5 in the guinea pig distal colon longitudinal muscle myenteric plexus preparation.
Role of the Heteroatoms in the Complex Metal Hydride Reduction of 2-<i>t</i>-Butyl-1,3-dioxan-5-one and 3-Oxoquinolizidine: Comparison of Their Reactivity and Stereochemistry with Those of the Corresponding Carbocyclic Compounds
作者:Yasuhisa Senda、Hiroshi Sakurai、Hiroki Itoh
DOI:10.1246/bcsj.72.285
日期:1999.2
The complexmetalhydridereductions of 2-t-butyl-1,3-dioxan-5-one (1) and 3-oxoquinolizidine (3) are faster than those of the corresponding carbocyclic compounds, 4-t-butylcyclohexanone (2) and trans-2-decalone (4). The stereoselectivities were similar in the LiAlH4 reduction, but the heteracyclohexanones exhibited higher stereoselectivity with NaBH4. These facts are discussed in terms of the intramolecular