T. Wakahara et W. Ando, REACTION OF HYDROSILANES WITH LITHIUM - FORMATION OF SILOLE ANIONS FROM 1-METHYLSILOLE VIA CARBODIANION, Chemistry Letters, (11), 1997, pp. 1179-1180
Three different types of silacyclopentadienyl anions have been obtaine
d in the reduction of 1-methylsilole 1 with excess lithium. Treatment
of lithiated solution with dimethylchlorosilane gave 2,5-bis(dimethyls
ilyl)silole derivatives 3a and 3b, and with trimethylchlorosilane gave
1-trimethylsilyl-1-methylsilole derivative 4 at an early stage, and 1
,1-bis(triemthylsilyl)silole derivative 8 at a late stage. Silole 1,1-
dianion 7 has been formed via silole 2,5-dianion 2 and silole 1-anion
5.