Selective monobromination of 1 gave
the key intermediate 5-bromo-50-trimethylsilyl-3,30-diphenylsilylene-
2,20-bithiophene (2) in 66% yield. Compound 2
was then desilylated with TFA to produce 5-bromo-3,30-
diphenylsilylene-2,20-bithiophene (3) with an isolated yield
of 98%.