Multi-step reaction with 7 steps
1: 1.) acetic acid, 2.) NaBH3CN / 1.) MeOH, RT, 30 min, 2.) MeOH, THF, RT, 2 h
2: 92 percent / diisopropylethylamine / CH2Cl2 / 16 h / 0 - 20 °C
3: 100 percent / 2 N LiOH / tetrahydrofuran; methanol / 16 h / Ambient temperature
4: 72 percent / N,N-diisopropylethylamine, Bop-Cl / CH2Cl2 / 16 h / 0 °C
5: 100 percent / 1 N LiOH / tetrahydrofuran; methanol / 16 h / Ambient temperature
6: N,N-diisopropylethylamine, Bop / acetonitrile; dimethylformamide / 16 h
7: 2 N LiOH / tetrahydrofuran / 4 h / Ambient temperature
With
lithium hydroxide; bis-(2-oxo-3-oxazolidinyl)phosphoryl chloride; sodium cyanoborohydride; (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; acetic acid; N-ethyl-N,N-diisopropylamine;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide; acetonitrile;
DOI:10.1021/jm950642a