Multi-step reaction with 14 steps
1: 89 percent / TMSOTf / CH2Cl2 / 16 h / -78 °C
2: 1.) BH3*SMe2, 2.) 5M aq. NaOH, 30percent H2O2 / 1.) THF, from 0 deg C to RT, 18 h, 2.) THF, from 0 deg C to RT, 120 min
3: imidazole / diethyl ether; dimethylformamide / 0 °C
4: 2,6-di-tert-butylpyridine / CH2Cl2 / Ambient temperature
5: n-Bu4NF / tetrahydrofuran
6: 95 percent / BCl3*SMe2 / CH2Cl2 / -78 - 0 °C
7: 99 percent / imidazole / dimethylformamide / 0 °C
8: 90 percent / HF*Pyr / tetrahydrofuran
9: 1.) (COCl)2, DMSO, 2.) Et3N
10: 91 percent / CH2Cl2 / -78 °C
11: 1.) (COCl)2, DMSO, 2.) Et3N
12: 90 percent / NaNH2 / diethyl ether / 0 °C
13: 100 percent / 48percent aq. HF / acetonitrile / 1 h / Ambient temperature
14: 1.) BH3, 2.) 3 M aq. NaOH, 30percent H2O2 / 1.) THF, -5 deg C, 45 min, 2.) THF, from 0 deg C to RT, 120 min
With
1H-imidazole; sodium hydroxide; 2,6-di-tert-butyl-pyridine; oxalyl dichloride; trimethylsilyl trifluoromethanesulfonate; dimethylsulfide borane complex; boron trichloride - methyl sulfide complex; hydrogen fluoride; borane; tetrabutyl ammonium fluoride; dihydrogen peroxide; pyridine hydrogenfluoride; sodium amide; dimethyl sulfoxide; triethylamine;
In
tetrahydrofuran; diethyl ether; dichloromethane; N,N-dimethyl-formamide; acetonitrile;
DOI:10.1021/ja974318b