The paramagnetic La@C82-A(C2v) with unsaturated thiacrown ethers forms 1 : 1 host–guest complexes of [La@C82-A(C2v)]−[D]+ in solution as a result of electron transfer.
An Economical Approach to the Synthesis of Unsaturated Thiacrown Ethers
作者:Jing-Kui Yang、Dong-Qing Sun
DOI:10.1055/s-0030-1260066
日期:2011.8
synthesize unsaturated thiacrown ethers through the reaction of 1,1-dichloroethylene with sodium sulfide in the presence of a 15-crown-5 catalyst. Besides the compounds containing cis-carbon-carbon double bonds, two unsaturated thiacrown ethers each containing one trans-carbon-carbon double bond were also isolated. unsaturated thiacrown ether - 1,1-dichloroethylene - economical approach - macrocyclic compounds
The methylation reactions of unsaturated thiacrown ether with methyl triflate proceeded to give mono- and dimethylated unsaturated thiacrown ether. The stereochemistry of the obtained products were determined by single-crystal X-ray diffraction analysis. The positive charges of the products were found to distribute throughout the entire unsaturated thiacrown ether moieties by calculation of electrostatic