Multi-step reaction with 10 steps
1.1: 9-BBN / tetrahydrofuran / 24 h / Heating
1.2: 67 percent / NaOH; H2O2 / 4 h / 0 - 40 °C
2.1: 96 percent / imidazole / dimethylformamide / 5 h / 20 °C
3.1: 93 percent / DMAP / CH2Cl2 / 3 h / -70 - 20 °C
4.1: 99 percent / dppp; NEt3 / Pd(OAc)2 / dimethylsulfoxide / 4 h / 80 °C
5.1: 99 percent / LiOH / methanol; H2O / 15 h / Heating
6.1: imidazole / dimethylformamide / 15 h / 20 °C
7.1: K2CO3 / methanol / 20 h / 20 °C
8.1: 28 percent / HBTU; DIPEA / dimethylformamide / 15 h / 20 °C
9.1: 62 percent / TBAF / tetrahydrofuran / 3 h / 0 - 20 °C
10.1: 70 percent / PPh3; imidazole; I2 / CH2Cl2 / 15 h / 20 °C
With
1H-imidazole; dmap; lithium hydroxide; 9-borabicyclo[3.3.1]nonane dimer; 1,3-bis-(diphenylphosphino)propane; tetrabutyl ammonium fluoride; iodine; potassium carbonate; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; triethylamine; N-ethyl-N,N-diisopropylamine; triphenylphosphine;
palladium diacetate;
In
tetrahydrofuran; methanol; dichloromethane; water; dimethyl sulfoxide; N,N-dimethyl-formamide;
DOI:10.1016/S0040-4039(01)01926-8