6-bromo-1-benzothiophen-3-one

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In analogy to the procedures described for the preparation of intermediate A-8 [A], intermediates A-2 [B] and A-2 [C], 6-bromo-benzo[b]thiophen-3-one was reacted with sodium borohydride in ethanol to give (rac)-6-bromo-2,3-dihydro-benzo[b]thiophen-3-ol, which was subsequently reacted with diphenylphosphoryl azide, DBU in toluene to give (rac)-3-azido-6-bromo-2,3-dihydro-benzo[b]thiophene, which was then reduced with triphenylphosphine in THF/water to yield the title compound as light yellow oil. MS: 229 (M+, 1Br). In analogy to the procedures described for the preparation of intermediate