Electrophilic aromatic substitutions of silylated furans and thiophenes with retention of the organosilyl group.

The influence of trialkylsilyl groups on the nucleophilic reactivities of furans and thiophenes is determined by kinetic experiments.

Nucleophilic reactivities of tributylstannyl-substituted furans and thiophenes.

Kinetic investigations of the reactions of benzhydryl cations with stannylated furans and thiophenes suggest that 2-(tributylstannyl)furan and -thiophene are preferentially attacked at the 5-position (k(rel), FcPhCH(+), 20 degrees C, CH(2)Cl(2)).