Multi-step reaction with 9 steps
1.1: potassium carbonate / N,N-dimethyl-formamide / 6 h / 0 - 20 °C / Inert atmosphere
2.1: potassium hydroxide / ethanol / 1 h / 20 °C / Inert atmosphere
3.1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 6.5 h / 0 °C / Inert atmosphere
4.1: dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere
5.1: tetrahydrofuran; hexane / 0.5 h / -78 °C / Inert atmosphere
5.2: 0.08 h / -78 °C / Inert atmosphere
6.1: 1,3-dimethylbarbituric acid; palladium diacetate; triphenylphosphine / ethanol / 2 h / 20 °C / Inert atmosphere
7.1: dmap; triethylamine / dichloromethane / 6 h / 20 °C / Inert atmosphere
8.1: ammonium chloride; zinc / tetrahydrofuran; water / 1.5 h / 0 °C
9.1: Pd(MeCN)2Cl(NO2); oxygen; copper dichloride / 5 h / 30 °C
With
dmap; oxalyl dichloride; 1,3-dimethylbarbituric acid; Pd(MeCN)2Cl(NO2); oxygen; palladium diacetate; potassium carbonate; ammonium chloride; triethylamine; N,N-dimethyl-formamide; triphenylphosphine; potassium hydroxide; copper dichloride; zinc;
In
tetrahydrofuran; ethanol; hexane; dichloromethane; water; N,N-dimethyl-formamide;
8.1: Barbier reaction / 9.1: reverse Wacker oxidation;
DOI:10.1021/jo1025749