A copper-catalyzed reaction between 2-bromo-benzothioamides and S8 or Se involving sulfur rearrangement is reported, enabling access to benzodithioles 2 and benzothiaselenoles 6 in the presence of Cs2CO3. In the absence of S8 or Se, the reaction affords dibenzodithiocines 7 via two consecutive C(sp2)-S Ullmann couplings.
据报道2-
溴-苯并
硫代酰胺与S8或Se之间的
铜催化反应涉及
硫的重排,在存在Cs2CO3的情况下,可与苯并二
硫代2和
苯并噻吩并茂的6接触。在不存在S 8或Se的情况下,该反应通过两个连续的C(sp 2)-S Ullmann偶合提供二苯并二
硫代7。