Multi-step reaction with 8 steps
1.1: 94 percent / imidazole / dimethylformamide / 23 h / 20 °C
2.1: 85 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / CH2Cl2; H2O / 2.5 h / 20 °C
3.1: 93 percent / LiBr; Et3N; methanesulfonyl chloride / tetrahydrofuran / 144 h / 20 °C
4.1: NaH / tetrahydrofuran / 20 °C
4.2: 80 percent / NaI / acetonitrile / 12 h / 60 °C
5.1: 93 percent / LiAlH4 / diethyl ether / 5 h / 0 - 20 °C
6.1: 58 percent / NaH; tetrabutylamminium iodide / tetrahydrofuran; dimethylsulfoxide / 0 - 20 °C
7.1: oxalyl chloride; DMSO; Et3N / CH2Cl2 / -78 - 0 °C
8.1: 1.16 g / tetrahydrofuran / 1 h / 0 °C
With
1H-imidazole; lithium aluminium tetrahydride; oxalyl dichloride; tetra-(n-butyl)ammonium iodide; sodium hydride; dimethyl sulfoxide; methanesulfonyl chloride; triethylamine; 2,3-dicyano-5,6-dichloro-p-benzoquinone; lithium bromide;
In
tetrahydrofuran; diethyl ether; dichloromethane; water; dimethyl sulfoxide; N,N-dimethyl-formamide;
7.1: Swern oxidation;
DOI:10.1021/ol0604264