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 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.
wavelengths by changing the solvent from acetonitrile to cyclohexane. The cyclic voltammograms of 4-8 indicate that the larger unsaturated thiacrown ethers were oxidized more easily than the smaller systems, and unsaturated thiacrown ethers were oxidized more easily than corresponding saturated systems. The reaction of 4 with silver trifluoroacetate in acetone afforded the colorless complex Ag(I)(C2H2S)5(CF3COO)