Multi-step reaction with 7 steps
1: 1) t-BuOK, 2) Hg(OAc)2 / 1) DMSO, 2 h, 2) acetone, H2O, 10 min
2: 1) (COCl)2, DMSO, 2) Et3N / 1) CH2Cl2, -60 deg C, 25 min, 2) -60 deg C up to 0 deg C, 3 min
3: 98 percent / tetrahydrofuran / 0.17 h / -40 °C
4: 1) NaH / 1) DMF, 1.5 h, 2) 10 deg C, 2 h
5: 85 percent / DDQ / CH2Cl2; H2O / 0.33 h
7: Bu3SnH / AIBN / toluene / 2 h / Heating
With
oxalyl dichloride; potassium tert-butylate; mercury(II) diacetate; tri-n-butyl-tin hydride; sodium hydride; dimethyl sulfoxide; triethylamine; 2,3-dicyano-5,6-dichloro-p-benzoquinone;
2,2'-azobis(isobutyronitrile);
In
tetrahydrofuran; dichloromethane; water; toluene;
DOI:10.1016/S0040-4020(01)96139-3