Multi-step reaction with 8 steps
1: 64 percent / NaH / 1,2-dimethoxy-ethane / 25 °C
2: 1.) DIBAL-H, PPh3, ZnCl2 / 1.) (Ph3P)2PdCl2 / 1.( THF, toluene, Et2O, 0 deg C, 2.) 25 deg C, 1 h
3: 89 percent / iPr2NEt / acetonitrile / 0 °C
4: 100 percent / NaOH / H2O; methanol; tetrahydrofuran / 1.) 25 deg C, overnight, 2.) reflux, 2 h
5: 87 percent / H2 / <(R)-BINAP>ruthenium acetate / methanol; tetrahydrofuran / 72 h / 2068.59 Torr
6: 96 percent / SOCl2 / 25 °C
7: 78 percent / LDA / tetrahydrofuran / -78 - 0 °C
8: 1.) NaH, 2.) n-BuLi / 1.) THF, 45 deg C, 5 h, 2.) 0 deg C, 30 min, 3.) -78 deg C ,18 min; 0 deg C, 25 min
With
sodium hydroxide; n-butyllithium; thionyl chloride; hydrogen; sodium hydride; diisobutylaluminium hydride; N-ethyl-N,N-diisopropylamine; triphenylphosphine; zinc(II) chloride; lithium diisopropyl amide;
bis-triphenylphosphine-palladium(II) chloride; Ru(OAc)2((R)-BINAP);
In
tetrahydrofuran; methanol; 1,2-dimethoxyethane; water; acetonitrile;
DOI:10.1021/jo990278d