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。