sodium methylate in methanol 8-hydroxyqionline was treated with NaOMe in MeOH, then Ph3SnCl was added, a mixture was heated at 65°C for 2 h; evapn., extn. (benzene), filtration, evapn., recrystn. (hot ethanol); elem. anal.;

tetrahydrofuran; sodium hydride anschl. mit Triphenylzinnchlorid;