Multi-step reaction with 6 steps
1.1: dichloro[(S)-(-)-2,2'-bis(diphenylphosphino)-1,1'-binaphthyl]ruthenium(II); hydrogen / methanol / 16 h / 100 °C / 4500.45 Torr
2.1: lithium diisopropyl amide / tetrahydrofuran; hexane / -60 - -30 °C
2.2: HMPA / -80 - -60 °C
3.1: 1H-imidazole; dmap / N,N-dimethyl-formamide / 16 h / 20 °C / Inert atmosphere
4.1: isopropyl magnesium bromide/chloride / tetrahydrofuran / 0.25 h / -10 °C / Inert atmosphere
4.2: 2 h / -10 - 20 °C / Inert atmosphere
5.1: tetrahydrofuran / -10 - 0 °C / Inert atmosphere
6.1: N,N,N',N'-tetramethylguanidine / 2 h / 20 °C / Inert atmosphere
With
1H-imidazole; dmap; dichloro[(S)-(-)-2,2'-bis(diphenylphosphino)-1,1'-binaphthyl]ruthenium(II); hydrogen; lithium diisopropyl amide; N,N,N',N'-tetramethylguanidine;
In
tetrahydrofuran; methanol; hexane; N,N-dimethyl-formamide;
5.1: Grignard reaction / 6.1: Michael addition;
DOI:10.1055/s-0030-1259286