8-Bromo-4,5-dihydro-6-oxa-1-thia-benzo[e]azulene → 4,5-Dihydrobenzo[b]thieno[2,3-d]oxepine-8-carbonitrile

Participants

Reaction Steps

A solution of 8-bromo-4,5-dihydro-6-oxa-1-thia-benzo[e]azulene (0.500 grams, 1.77 mmol) and copper cyanide (0.48 grams, 5.30 mmol) in 10 ml of DMF was flash heated on Biotage microwave. The reaction mixture was diluted with a large volume of EtOAc and this solution was filtered through celite by vacuum filtration. The filtrate was plated onto a 1/1 mixture on silica/celite and dry load purified by MPLC on a 14 gram silica column eluting with 10 to 80% EtOAc/heptanes to give 500 mg (123%) of 4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-8-carbonitrile as determined by LC/MS.

Provenance & Evidence