Photocyclisation of 2-Methoxyphenyl Pheynil Ethers

Abstract

The Photoinduced resotions of diaryl others have been extensively studied and are found to encompass rearrangesent to the 2- and 4-hydraxybiphanyl derivatives and other bond clesvage loading ultimately to the corresponding phenol and benzene derivatives.^2–6 On one occasion dibenzofuran was reparted as a photoproduct of diphenyl other⁷ but this observation has not been supported by latter work^4,8,9. In contrast 2-Ahlorophenyl 1-naphthyl other has been Shown to undergo efficient photodahydrohalogenstion to form benzo[b]naphtho[2,1-d]furan⁹.