Multi-step reaction with 9 steps
1: 100 percent / i-Pr2NEt / CH2Cl2 / 14 h / Ambient temperature
2: aq. KOH / ethanol / 16 h / 80 °C
3: Et3N / tetrahydrofuran / 2 h / Ambient temperature
4: 91 percent / KH / tetrahydrofuran / 0.5 h / Heating
5: 78 percent / aq. LiBF4 / acetonitrile / 2 h / 70 °C
6: 77 percent / oxalyl chloride, DMSO / CH2Cl2 / 0.5 h / -78 °C
7: 1.) n-BuLi / 1.) THF, -78 deg C, 2 h, 2.) THF, a) -78 deg C, 2 h, b) -50 deg C, 8 h
8: 90 percent / AgNO3 / ethanol / 20 h / Ambient temperature
9: 88 percent / NaI, aq. CH2O, camphorsulfonic acid monohydrate / 1 h / 100 °C
With
potassium hydroxide; lithium tetrafluoroborate; n-butyllithium; formaldehyd; oxalyl dichloride; camphor-10-sulfonic acid; potassium hydride; silver nitrate; dimethyl sulfoxide; triethylamine; N-ethyl-N,N-diisopropylamine; sodium iodide;
In
tetrahydrofuran; ethanol; dichloromethane; acetonitrile;
DOI:10.1021/ja961640y