3-chloro-benzenecarboperoxoic acid in dichloromethane T=0°C;

potassium hydroxide; tris(dibenzylideneacetone)dipalladium (0); 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene in toluene Heating;

1: potassium carbonate / dimethyl sulfoxide / 18 h / 110 °C / Inert atmosphere 2: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 0 - 20 °C / Inert atmosphere View Scheme

1: potassium carbonate / dimethyl sulfoxide / 18 h / 110 °C / Inert atmosphere 2: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 0 - 20 °C / Inert atmosphere View Scheme

1.1: palladium diacetate; silver carbonate; p-benozquinone / 1,2-dichloro-ethane / 12 h / 130 °C 2.1: n-butyllithium / tetrahydrofuran; hexane / 0.17 h / -78 °C / Inert atmosphere 2.2: Inert atmosphere View Scheme