Multi-step reaction with 7 steps
1.1: N,N-dimethyl-formamide / 5 h / 40 °C
2.1: zinc; chloro-trimethyl-silane; ethylene dibromide / N,N-dimethyl acetamide / 2 h / 40 °C / Inert atmosphere
2.2: 2 h / 70 °C / Inert atmosphere
3.1: (S)-1-methyl-3,3-diphenyl-hexahydropyrrolo[1,2-c][1,3,2]oxazaborole; borane-THF / tetrahydrofuran / 0.75 h / -30 - 0 °C
4.1: triethylamine / dichloromethane / 0.25 h / 0 °C
5.1: caesium carbonate / N,N-dimethyl-formamide / 1 h / 60 °C
6.1: trifluoroacetic acid / dichloromethane / 0.5 h / 20 °C
7.1: ethanol / 0.25 h / 125 °C / Microwave irradiation
With
chloro-trimethyl-silane; borane-THF; caesium carbonate; ethylene dibromide; triethylamine; trifluoroacetic acid; (S)-1-methyl-3,3-diphenyl-hexahydropyrrolo[1,2-c][1,3,2]oxazaborole; zinc;
In
tetrahydrofuran; ethanol; dichloromethane; N,N-dimethyl acetamide; N,N-dimethyl-formamide;