杂元素冠醚研究（Ⅺ）──邻苯二硒型硒杂冠醚的合成

Studies on Heterocrown Ether(Ⅺ)──The Syntheses or o-Benzene Diselenium Type of Selenacrown Compounds

在碱性条件下，聚邻二硒代苯被硼氢化钾还原成双硒离子后与二卤代和缩后关环得到７个邻苯二硒型硒杂冠醚化合物，其结构经元素分析、ＭＳ、ＩＲ和ＨＮＭＲ证实。

The key to the syntheses of selenacrown ethers is the syntheses of selenium-con-taining intermediates, This paper described an improved method to prepare poly(o-diselenobenzene), and poly(o-diselenobenzene) was used as the intermediate for the syntheses of o-benzene diselenium type of selenacrown ether compounds: under an alkaline condition,poly(o-diselenobenzene) was reduced by potassium borohydride into o-benzenediselenolateanion, which condensed with dihalides, and seven selenacrown compounds were obtained.Besides[1+1] products,[2+2] products were also isolated. All the selenacrown compounds were identified by elemental analysis, MS,￣1H NMR and IR, and their syntheti methods and spectral characteristics were discussed.