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
ethers with 15, 18, and 21 members were oxidized to sulfoxides by the reaction with m-CPBA. The reaction with t-BuOCl at −20 °C also afforded sulfoxides, whereas the reaction at room temperature yielded cis−trans isomerized compounds. The cis−trans isomerized compound was also obtained by the photochemicalreaction or by the reaction with NCS and NCP. Meanwhile, the reaction with NBS and NBP provided