favored at the adjacent C-2 position but rearrangement to the C-5 position can occur after prolonged reaction times. This reversible Friedel-Crafts methodology has been employed for the synthesis of the ant trail pheromone, methyl 4-methylpyrrole-2-carboxylate.
3-烷基-1-(苯磺酰基)
吡咯的Friedel-Crafts酰化反应似乎在相邻的C-2位置具有动力学上的优势,但在延长的反应时间后可能发生重排至C-5位置。这种可逆的Friedel-Crafts方法已用于合成蚂蚁踪迹信息素
4-甲基吡咯-2-羧酸甲酯。