Multi-step reaction with 16 steps
1.1: 80 percent / i-Pr2NEt / CH2Cl2 / 15.5 h / 0 - 20 °C
2.1: t-BuLi / tetrahydrofuran; pentane / 0.08 h / -78 °C
2.2: 53 percent / HMPA / tetrahydrofuran; pentane / 0.5 h / -78 °C
3.1: 90 percent / TBAF / tetrahydrofuran / 2 h / 0 - 20 °C
4.1: Py*SO3; Et3N / CH2Cl2; dimethylsulfoxide / 0 - 20 °C
5.1: 142 mg / CrCl2 / tetrahydrofuran / 0.83 h / 20 °C
6.1: 100 percent / Pd(Ph3P)4 / tetrahydrofuran / 1.5 h / 20 °C
7.1: 83 percent / HCl / tetrahydrofuran; H2O / 6 h / 20 °C
8.1: 72 percent / pyridinium dichromate / dimethylformamide / 3.5 h / 20 °C
9.1: 91 percent / diethyl phosphorocyanidate; Et3N / dimethylformamide / 3.5 h / 0 - 20 °C
10.1: bis(2-methoxyethyl)aminosulfur trifluoride / CH2Cl2 / 0.42 h / -20 °C
11.1: 21 mg / BrCCl3; DBU / CH2Cl2 / 14 h / 0 - 20 °C
12.1: 100 percent / LiOH; H2O / tetrahydrofuran / 1.33 h / 0 - 20 °C
13.1: 39 mg / diethyl phosphorocyanidate; Et3N / dimethylformamide / 9.5 h / 0 - 20 °C
14.1: 27 mg / TBAF / tetrahydrofuran / 1.17 h / 0 - 20 °C
15.1: Dess-Martin periodinane / CH2Cl2 / 15 h / 20 °C
16.1: PPh3; 2,6-di-tert-butylpyridine; BrCCl2CCl2Br / CH2Cl2 / 0.5 h / 0 °C
16.2: 16 mg / DBU / CH2Cl2; acetonitrile / 1 h / 0 - 20 °C
With
chromium dichloride; hydrogenchloride; lithium hydroxide; dipyridinium dichromate; 2,6-di-tert-butyl-pyridine; 1,2-dibromo-1,1,2,2-tetrachloroethane; Bromotrichloromethane; diethyl cyanophosphonate; tetrabutyl ammonium fluoride; water; tert.-butyl lithium; sulfur trioxide pyridine complex; Dess-Martin periodane; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; N-ethyl-N,N-diisopropylamine; triphenylphosphine; (bis-(2-methoxyethyl)amino)sulfur trufluoride;
tetrakis(triphenylphosphine) palladium(0);
In
tetrahydrofuran; dichloromethane; water; dimethyl sulfoxide; N,N-dimethyl-formamide; pentane;
4.1: Parikh-Doering oxidation / 15.1: Dess-Martin oxidation;
DOI:10.1016/S0040-4020(01)00593-2