(E)-3-(4-acetoxy-5-ethyl-3-methoxy-1-naphthyl)-2-methylpropenoic acid → E 5090

Participants

Reaction Steps

1.15 g of (E)-3-(4-acetoxy-5-ethyl-3-methoxy-1-naphthyl)-2-methylpropenoic acid was dissolved in 200 ml of acetone and irradiated with light from a high pressure mercury lamp through a Pyrex filter at room temperature for 3 hours. The reaction mixture was concentrated in vacuo and purified by silica gel column chromatography (3% methanol/chloroform) to obtain 470 mg of the titled compound as colorless crystals.

Provenance & Evidence