Multi-step reaction with 10 steps
1: 94 percent / tetrahydrofuran / 48 h / Ambient temperature
2: 82 percent / N-ethyldiisopropylamine / CH2Cl2 / 24 h
3: 1.) ozone, 2.) PPh3 / 1.) CH2Cl2, 2.) a) -78 deg C, 1 h, b) r.t., 2h
4: 9 percent / CrCl3, LiAlH4 / tetrahydrofuran / 60 h / -6.5 °C
5: 1. NaH / 1.) DMF, 2.) DMF, r.t., 24 h
6: 1.) ozone, 2.) PPh3 / 1.) CH2Cl2
7: LiAlH4 / diethyl ether / 24 h / 0 deg C to r.t.
8: 93 percent / PPh3, DEAD / tetrahydrofuran / a) 0 deg C to r.t., b) r.t., 24 h
9: 92 percent / 25percent HCl / methanol / 2 h / 60 °C
10: 89 percent / DMAP / CH2Cl2 / 1 h / -30 °C
With
hydrogenchloride; dmap; chromium chloride; lithium aluminium tetrahydride; sodium hydride; ozone; N-ethyl-N,N-diisopropylamine; triphenylphosphine; diethylazodicarboxylate;
In
tetrahydrofuran; methanol; diethyl ether; dichloromethane;
DOI:10.1021/jo00037a043