When ethyl or phenyl azidoformate, or p-tolylsulphonyl azide are decomposed in warm tetrachlorothiophene, tetrachlorothiophene S,N-ylides are formed; 2,5-dichloro-, 2,5-dibromo-, and tetrabromo-thiophene on the other hand give products arising from attack at the α-position followed by rearrangement.
当
叠氮基
甲酸乙酯或
叠氮基
甲酸苯酯,或对
甲苯磺酰
叠氮在温热的
四氯噻吩中分解时,形成
四氯噻吩S,N-基;另一方面,2,5-二
氯-,2,5-二
溴-和四
溴-
噻吩产生的产物是由α-位进攻而引起的,然后进行了重排。