Multi-step reaction with 7 steps
1: 1.) cHex2BCl, Et3N, 3.) H2O2 / 1.) Et2O, 0 deg C, 2 h, 2.) Et2O, 0 deg C, 2 h; -20 deg C, 16 h, 3.) pH7 buffer-MeOH, 0 deg C, 1 h
2: 86 percent / SmI2 / tetrahydrofuran / 16 h / 3 °C
3: 2,6-lutidine / CH2Cl2 / 0.67 h / -78 °C
4: H2 / Pd(OH)2 / tetrahydrofuran / 16 h / 20 °C
5: 1.) (COCl)2, DMSO, 2.) Et3N / 1.) CH2Cl2, -78 deg C, 90 min, 2.) CH2Cl2, -78 deg C, 30 min
6: 73 percent / CrCl2 / tetrahydrofuran / 16 h / 3 °C
7: 94 percent / PPTS / methanol / 48 h / 20 °C
With
2,6-dimethylpyridine; chromium dichloride; samarium diiodide; oxalyl dichloride; dicyclohexylboron chloride; hydrogen; dihydrogen peroxide; pyridinium p-toluenesulfonate; dimethyl sulfoxide; triethylamine;
palladium dihydroxide;
In
tetrahydrofuran; methanol; dichloromethane;
DOI:10.1016/S0040-4039(96)02395-7