Multi-step reaction with 7 steps
1.1: lithium hydroxide / 1,2-dimethoxyethane; water / 6 h / 50 °C
1.2: 20 °C / pH 3
2.1: 15-crown-5; water; sodium hydride / toluene; mineral oil / 2 h / 20 °C / Inert atmosphere
2.2: 2 h / 20 °C / Inert atmosphere
3.1: water; lithium hydroxide / acetonitrile / 16 h / 20 °C
4.1: 2,4,6-trichlorobenzoyl chloride; triethylamine / tetrahydrofuran / 1 h / 20 °C
4.2: 2 h / Reflux
5.1: tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride / dichloromethane / 16 h / 60 °C
6.1: palladium 10% on activated carbon; hydrogen; triethylamine / methanol; ethyl acetate / 1 h
7.1: lithium diisopropyl amide / tetrahydrofuran / 1 h / -78 °C
7.2: 1.5 h / -78 - -40 °C
7.3: 17 h / 0 - 20 °C
With
tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride; 15-crown-5; 2,4,6-trichlorobenzoyl chloride; palladium 10% on activated carbon; water; hydrogen; sodium hydride; triethylamine; lithium hydroxide; lithium diisopropyl amide;
In
tetrahydrofuran; methanol; 1,2-dimethoxyethane; dichloromethane; water; ethyl acetate; toluene; acetonitrile; mineral oil;
4.1: Yamaguchi esterification;
DOI:10.1002/jccs.201100587