Multi-step reaction with 7 steps
1: 85 percent / diisopropylethylamine / dimethylformamide / 3 h / 91 - 94 °C
2: 100 percent / NaBH4 / methanol; tetrahydrofuran / 2 h / 0 °C
3: 95 percent / Et3SiH, TFA / 1.) 0 deg C, 1.5 h, 2.) RT, overnight
4: 80 percent / H2 / PtO2 / ethyl acetate / 1.25 h / 2068.6 Torr
5: 1.) 48percent aq. HBr, sodium nitrite, 2.) Cu2O / 1.) acetone, methanol, from 0 to 5 deg C, 15 min, 2.) acetone, methanol, 1 h
6: 87 percent / K2CO3 / dimethylformamide / Ambient temperature
7: 70 percent / aq. NaOH / methanol / 2 h / Heating
With
copper(I) oxide; triethylsilane; sodium hydroxide; sodium tetrahydroborate; hydrogen bromide; hydrogen; potassium carbonate; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid; sodium nitrite;
platinum(IV) oxide;
In
tetrahydrofuran; methanol; ethyl acetate; N,N-dimethyl-formamide;
DOI:10.1021/jm960230h