Multi-step reaction with 7 steps
1: 79 percent / H2 / 10 percent Pd/C / ethanol / 24 h / Ambient temperature
2: 100 percent / PPTS / tetrahydrofuran / 11 h / Ambient temperature
3: 81 percent / Cs2CO3 / methanol / 24 h / Ambient temperature
4: 83 percent / TsOH*H2O / methanol / 72 h / Ambient temperature
5: 2.) NaBH3CN / 1.) H2O, MeOH, RT, 3 h, 2.) H2O, MeOH, 15 h
6: Et3N, DMAP / acetonitrile / 2 h / Ambient temperature
7: 1.) Et3N, TPSCl, DMAP, 2.) NH4OH / 1.) MeCN, RT, 3 h, 2.) MeCN, 2 h
With
dmap; ammonium hydroxide; Triphenylsilyl chloride; hydrogen; pyridinium p-toluenesulfonate; sodium cyanoborohydride; caesium carbonate; toluene-4-sulfonic acid; triethylamine;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; ethanol; acetonitrile;
DOI:10.1021/jm980466g