Formation of carbanions derivatives of C-acids activated by sulfonyl groups in the presence of organic bases in acetonitrile and tetrahydrofuran

The spectrophotometric examination of the products of the proton transfer reaction between disulfonyl carbon acids as: 4-nitrophenyl[bis(ethylsulfonyl)]methane (I) and 4-nitrophenyl[bis(benzylsulfonyl)]methane (II) and organic bases: 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD), 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD), 1,1′,3,3′-tetramethylguanidine (TMG) and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) at 25 °C in acetonitrile (MeCN) and tetrahydrofuran (THF) is presented and discussed.