An olefin polyanion equivalent: A new olefin synthesis from triflones
作者:James B. Hendrickson、Gerald J. Boudreaux、Paul S. Palumbo
DOI:10.1016/s0040-4039(01)91214-6
日期:1984.1
α-Trifyl-dimethylsulfone (CF3SO2CH2SO2CH3) is a reagent which allows successive polyalkylation of the two carbons with regiocontrol. The polyalkylated trifyl-sulfone then undergoes a Ramberg-Bäcklund reaction with loss of triflinate anion and extrusion of SO2 to form an olefin. In synthetic terms the net structural change is equivalent to regiospecific alkylation of an olefin polyanion, =CC=.
α-三苯甲基-二甲基砜(CF 3 SO 2 CH 2 SO 2 CH 3)是一种试剂,它可以通过区域控制来使两个碳连续聚烷基化。然后使聚烷基化的三氟甲基砜经受Ramberg-Bäcklund反应,损失三氟甲基磺酸根阴离子并挤出SO 2形成烯烃。用合成的术语来说,净结构变化等同于烯烃聚阴离子的区域特异性烷基化,=C=C=。
Mild convenient synthesis of α-methylene sulfones
作者:James B. Hendrickson、Paul S. Palumbo
DOI:10.1016/s0040-4039(00)98853-1
日期:1985.1
Reaction of paraformaldehyde with α-trifyl-sulfones and potassium carbonate at room temperature affords vinyl sulfones in good yield under mild conditions, with loss of triflate anion.