作者:Jan Bergman、Lars Engman
DOI:10.1016/s0022-328x(00)87923-1
日期:1980.11
Several substituted 3-halogenobenzo[b] tellurophenes have been synthesized by treating phenylacetylenes with TeO2 in acetic acid in the presence of a lithium halide. A mechanism is postulated involving an electrophilic attack by a solubilized tellurium species on the acetylenic bond with introduction of a halogen atom followed by cyclization to the benzo[b]tellurophene system. The benzo[b]tellurophenes
在卤化锂的存在下,通过在乙酸中用TeO 2处理苯乙炔,已经合成了几种取代的3-卤代苯并[ b ]碲二苯醚。推测一种机制涉及通过溶解的碲物种对炔键的亲电子攻击,引入卤素原子,然后环化至苯并[ b ]碲代芬系统。所述苯并[ b ]碲可以有Cl容易氯化2气体,以产生苯并[ b ]碲1,1-二氯化物衍生物,但试图锂化是3位是不成功的,并产生了一个环破裂。在三氟乙酸3-氯苯并[ b]中回流时将] tellurophene转化为3-oxo-2,3-dihydrobenzo [ b ] tellurophene。