Multi-step reaction with 6 steps
1: 93 percent / LiAlH4
2: 86 percent / Swern oxidation
3: 1.) n-BuLi, 1,1,3,3,3-hexamethyldisilazane / 1.) THF, hexanes, -50 deg C, 3 h, 2.) -38 deg C, 30 min
4: 90 percent / ethyldiisopropylamine, 4-(dimethylamino)pyridine / CH2Cl2 / 30 h / Ambient temperature
5: 1.) LiI, 2.) LiAlH4 / 1.) diethyl ether, -40 deg C, 5 min, 2.) -90 deg C, 1 h, then to r.t.
6: 95 percent / 500 °C / 0.01 Torr
With
dmap; lithium aluminium tetrahydride; n-butyllithium; N-ethyl-N,N-diisopropylamine; 1,1,1,3,3,3-hexamethyl-disilazane; lithium iodide;
In
dichloromethane;
DOI:10.1021/jo00063a009