Diphenyl Ether → Thieno[3,2-b]pyridin-7-ol

Participants

Reaction Steps

A 200-mL rb flask was charged with 2,2-dimethyl-5-((thiophen-3-ylamino)methylene)-1,3-dioxane-4,6-dione (6.73 g, 26.6 mmol) and diphenyl ether (25 mL) and heated to about 200 deg C. for about 30-45 min and the mixture was allowed to cool to rt overnight. The mixture was scraped down with a spatula and diluted with MTBE. The mixture was filtered through paper and washed with MTBE. The brown solid was air dried to yield thieno[3,2-b]pyridin-7-ol.

Provenance & Evidence