Ring expansion of thiochroman-4-one and isothiochroman-4-one with ethyl diazo(lithio)acetate to tetrahydrobenzothiepin beta-oxoesters.
D001391:Azo Compounds; D001582:Benzothiepins / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D002867:Chromones
D001391:Azo Compounds; D001582:Benzothiepins; D002867:Chromones