1,8-Diazabicyclo(5.4.0)undec-7-ene → 5-Bromo-6-fluorobenzo[b]thiophene

Participants

Reaction Steps

Using analogous reaction condition and reagents as described in Example 25 for the preparation of I-25c above, 5-bromo-6-fluorobenzo[b]thiophene-2-carboxylic acid (I-28c: 240 mg 0.875 mmol) in DMA (4 mL) and DBU (0.523 mL, 3.503 mmol) were heated in microwave to afford the crude product. Purification by column chromatography on silica gel (100% hexane) afforded 110 mg of the product (55% yield).

Provenance & Evidence