Multi-step reaction with 5 steps
1: 55 percent / DCC, HOBT / tetrahydrofuran / Heating
2: Pd2(dba)3*CHCl3, (R)-BINAP, 1,2,2,6,6-pentamethylpiperidine / N,N-dimethyl-acetamide / 1.5 h / 100 °C
3: 3M aq. HCl / tetrahydrofuran / Ambient temperature
4: 1.) Et3N, MgSO4, 2.) LiAlH4 / 1.) THF, RT, overnight, 2.) THF, reflux, 1.5 h
5: BBr3 / CH2Cl2 / 23 °C
With
1,2,2,6,6-pentamethylpiperidine; hydrogenchloride; tris(dibenzylideneacetone)dipalladium(0) chloroform complex; lithium aluminium tetrahydride; boron tribromide; magnesium sulfate; benzotriazol-1-ol; (R)-2,2'-bis(diphenylphosphanyl)-1,1'-binaphthyl; triethylamine; dicyclohexyl-carbodiimide;
In
tetrahydrofuran; dichloromethane; N,N-dimethyl acetamide;
DOI:10.1021/ja980788+