1: tetrahydrofuran / 10 h / Reflux 2: boron trifluoride diethyl etherate / dichloromethane / 1 h / 20 °C 3: methanol; N-bromosuccinmide / Reflux 4: 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride 5: potassium carbonate; 3-chloro-benzenecarboperoxoic acid / dichloromethane / Reflux 6: Reflux View Scheme

1: methanol; N-bromosuccinmide / Reflux 2: 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride 3: potassium carbonate; 3-chloro-benzenecarboperoxoic acid / dichloromethane / Reflux 4: Reflux View Scheme

1: potassium carbonate; 3-chloro-benzenecarboperoxoic acid / dichloromethane / Reflux 2: Reflux View Scheme

1: boron trifluoride diethyl etherate / dichloromethane / 1 h / 20 °C 2: methanol; N-bromosuccinmide / Reflux 3: 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride 4: potassium carbonate; 3-chloro-benzenecarboperoxoic acid / dichloromethane / Reflux 5: Reflux View Scheme

Reflux;