Studies of Thioiminocarbonates. I. The Formation and Decomposition of<i>O</i>-Alkyl<i>S</i>-Aryl Thioiminocarbonates in the Reaction of Aryl Thiocyanates with Alcohols in the Presence of the Cyanide Ion
作者:Kazuhiko Tanaka、Jun-ichi Hayami、Aritsune Kaji
DOI:10.1246/bcsj.44.2815
日期:1971.10
The reactions of aryl thiocyanates (I) with alcohol in the presence of cyanideion were found to give alkyl aryl sulfides (III). The intermediate was isolated in the case of p-tolyl thiocyanate with methanol at 0°C and was determined to be O-methyl S-p-tolyl thioiminocarbonate (IIa) on the basis of NMR and IR spectral studies. The treatment of IIa with the cyanideion afforded methyl p-tolyl sulfide
The synthesis of thiophene based conducting polymer molecular actuators, exhibiting electrically triggered molecular conformational transitions is reported. Actuation is believed to be the result of conformational rearrangement of the polymer backbone at the molecular level, not simply ion intercalation in the bulk polymer chain upon electrochemical activation. Molecular actuation results from &pgr;-&pgr; stacking of thiophene oligomers upon oxidation, producing a reversible molecular displacement that leads to surprising material properties, such as electrically controllable porosity and large strains. The existence of active molecular conformational changes is supported by in situ electrochemical data. Single molecule techniques have been used to characterize the molecular actuators.
Urea derivatives, processes for their preparation, their use as medicaments, and pharmaceutical compositions containing them
申请人:Jary Helene
公开号:US20070179134A1
公开(公告)日:2007-08-02
The present invention provides compounds of Formula (I):
in which R
1
, R′
1
, R
2
, R′
2
, R
3
, and Y have the meanings given in the description are useful in the treatment of conditions susceptible to modulating ion channels, to a process for their preparation, their application by way of medicaments, and to pharmaceutical compositions containing them.
The synthesis of thiophene based conducting polymer molecular actuators, exhibiting electrically triggered molecular conformational transitions is reported. Actuation is believed to be the result of conformational rearrangement of the polymer backbone at the molecular level, not simply ion intercalation in the bulk polymer chain upon electrochemical activation. Molecular actuation results from π-π stacking of thiophene oligomers upon oxidation, producing a reversible molecular displacement that leads to surprising material properties, such as electrically controllable porosity and large strains. The existence of active molecular conformational changes is supported by in situ electrochemical data. Single molecule techniques have been used to characterize the molecular actuators.