1: potassium carbonate / N,N-dimethyl-formamide / 6 h / Reflux; Inert atmosphere 2: methanol / 12 h / Reflux 3: potassium carbonate / N,N-dimethyl-formamide / 2 h / Inert atmosphere; Reflux 4: diethylaniline / 6 h / Reflux; Inert atmosphere 5: AlCl3, aluminium chloride; dimethylsulfide / dichloromethane / 0 - 30 °C 6: potassium carbonate / N,N-dimethyl-formamide / 0.5 h / Reflux; Inert atmosphere View Scheme

1: methanol / 12 h / Reflux 2: potassium carbonate / N,N-dimethyl-formamide / 2 h / Inert atmosphere; Reflux 3: diethylaniline / 6 h / Reflux; Inert atmosphere 4: AlCl3, aluminium chloride; dimethylsulfide / dichloromethane / 0 - 30 °C 5: potassium carbonate / N,N-dimethyl-formamide / 0.5 h / Reflux; Inert atmosphere View Scheme

1: potassium carbonate / N,N-dimethyl-formamide / 2 h / Inert atmosphere; Reflux 2: diethylaniline / 6 h / Reflux; Inert atmosphere 3: AlCl3, aluminium chloride; dimethylsulfide / dichloromethane / 0 - 30 °C 4: potassium carbonate / N,N-dimethyl-formamide / 0.5 h / Reflux; Inert atmosphere View Scheme

1: diethylaniline / 6 h / Reflux; Inert atmosphere 2: AlCl3, aluminium chloride; dimethylsulfide / dichloromethane / 0 - 30 °C 3: potassium carbonate / N,N-dimethyl-formamide / 0.5 h / Reflux; Inert atmosphere View Scheme

1: AlCl3, aluminium chloride; dimethylsulfide / dichloromethane / 0 - 30 °C 2: potassium carbonate / N,N-dimethyl-formamide / 0.5 h / Reflux; Inert atmosphere View Scheme

N,N-dimethyl-aniline Claisen rearrangement and Wittig reaction; 6 h; Heating;

diethyl ether

3-chloro-benzenecarboperoxoic acid in dichloromethane T=20°C; 0.5 h;

Shi asymmetric epoxidation; Title compound not separated from byproducts;

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