10.1248/cpb.34.1917
The research focused on the synthesis and conformational analysis of 1-Methyl-3,4-benzo-7-thia-2-azabicyclo[3.3.1]nonane 7-oxide, a novel tricyclic compound with potential antispasmodic activity. The compound was synthesized through the reaction of quinaldine with methylsulfinylmethyl carbanion, and its structure was elucidated using spectral data and chemical evidence. The conformational analysis was conducted using proton and carbon-13 nuclear magnetic resonance spectroscopy, along with molecular mechanics calculations, which indicated that the stable conformer has a chairthiane ring with an equatorial sulfoxy group. Key chemicals used in the process included quinaldine, methylsulfinylmethyl carbanion, dimethylsulfoxide (DMSO), Raney nickel for desulfurization, and various quinaldine derivatives. The research concluded that the synthesized compound and its derivatives adopt a chair conformation with an equatorial sulfoxy group, which was consistent with the observed NMR data and molecular mechanics calculations.