An Economical Approach to the Synthesis of Unsaturated Thiacrown Ethers

[摘要]：The inexpensive starting material, 1,1-dichloroethylene, was used as a substitute for 1,2-dichloroethylene to 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.

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