Multi-step reaction with 13 steps
1.1: lithium aluminium tetrahydride / diethyl ether / 1 h / 0 °C
2.1: sodium hydride / tetrahydrofuran / 0.5 h / 0 °C
2.2: 2 h / 0 - 20 °C
3.1: dimethylsulfide borane complex / tetrahydrofuran / 5 h / 0 °C
3.2: 16 h / 20 °C
4.1: Dess-Martin periodane / dichloromethane / 1 h / 20 °C
5.1: di-n-butylboryl trifluoromethanesulfonate / dichloromethane / 0.17 h / 0 °C
5.2: 0.5 h / 0 °C
5.3: 1 h / 0 °C
6.1: sodium tetrahydroborate / tetrahydrofuran; water / 20 °C
7.1: dmap; triethylamine / dichloromethane / 20 h / 0 - 20 °C
8.1: lithium aluminium tetrahydride / tetrahydrofuran / 3 h / Reflux
9.1: N-ethyl-N,N-diisopropylamine / dichloromethane / 0 - 20 °C
10.1: ammonia; lithium / tetrahydrofuran / 1 h / -78 °C
11.1: dipyridinium dichromate / N,N-dimethyl-formamide / 20 °C
12.1: 2,4,6-trichlorobenzoyl chloride; N-ethyl-N,N-diisopropylamine / tetrahydrofuran / 1 h / 0 °C
12.2: 6 h / 20 °C
13.1: tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride / benzene / 24 h / Inert atmosphere; Reflux
With
tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride; dmap; sodium tetrahydroborate; lithium aluminium tetrahydride; dipyridinium dichromate; dimethylsulfide borane complex; di-n-butylboryl trifluoromethanesulfonate; 2,4,6-trichlorobenzoyl chloride; ammonia; lithium; sodium hydride; Dess-Martin periodane; triethylamine; N-ethyl-N,N-diisopropylamine;
In
tetrahydrofuran; diethyl ether; dichloromethane; water; N,N-dimethyl-formamide; benzene;
5.1: |Evans Aldol Reaction / 5.2: |Evans Aldol Reaction / 10.1: |Birch Reduction;
DOI:10.1016/j.tetasy.2012.07.006