Formaldehyde → HCID 66592542, compound

Participants

Reaction Steps

A solution of ethyl 2-(7-methoxy-1-benzofuran-3-yl)ethylcarbamate (from step 4) (0.649 g, 2.5 mmol), paraformaldehyde (0.150 g, 5.0 mmol) and 4-toluene sulphonic acid (0.0475 g, 0.125 mmol) was subjected to Dean-Stark for 2-3 hrs. After cooling to RT, water was added and organic layer was separated dried over anhy. sodium sulphate and concentrated. On purification on silica gel, it yielded ethyl 8-methoxy-3,4-dihydro[1]benzofuro[2,3-c]pyridine-2(1H)-carboxylate (96%).

Provenance & Evidence