Multi-step reaction with 5 steps
1.1: oxalyl dichloride / N,N-dimethyl-formamide / dichloromethane / 1 h / 20 °C
2.1: dmap / dichloromethane / 20 °C
3.1: 2,2,6,6-tetramethyl-piperidine; N,N,N,N,-tetramethylethylenediamine; n-butyllithium / hexane; tetrahydrofuran / 0.75 h / -78 °C
3.2: 3 h / -78 - 20 °C
4.1: boron tribromide / dichloromethane / 4 h / -78 - -10 °C
5.1: dmap; N-ethyl-N,N-diisopropylamine / dichloromethane / 1 h / 20 °C
With
2,2,6,6-tetramethyl-piperidine; dmap; n-butyllithium; oxalyl dichloride; N,N,N,N,-tetramethylethylenediamine; boron tribromide; N-ethyl-N,N-diisopropylamine;
N,N-dimethyl-formamide;
In
tetrahydrofuran; hexane; dichloromethane;