Multi-step reaction with 9 steps
1: 51 percent / NaH / 1,2-dimethoxy-ethane / 1 h / 165 °C
2: 79 percent / NaBH4 / methanol / 1.) -78 deg C, 10 min, 2.) -78 to 23 deg C, 2 h
3: Et3N / CH2Cl2 / 12 h / 0 - 23 °C
4: DBU / tetrahydrofuran / 1 h / 23 °C
5: LiOH*H2O / tetrahydrofuran; H2O / 12 h / 23 °C
6: Et3N / tetrahydrofuran / 1.) -15 deg C, 15 min, 2.) -15 to 0 deg C, 15 min
7: BuLi / hexane; tetrahydrofuran / 1 h / -78 °C
8: 73 percent / L-Selectride / tetrahydrofuran / 0.25 h / -78 °C
9: 100 percent / oxone / methanol; H2O / 6 h / 23 °C
With
Oxone; lithium hydroxide; sodium tetrahydroborate; n-butyllithium; L-Selectride; sodium hydride; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine;
In
tetrahydrofuran; methanol; 1,2-dimethoxyethane; hexane; dichloromethane; water;
DOI:10.1021/jo00124a042