Multi-step reaction with 7 steps
1: LiI*2H2O, NaBH4 / 1,2-dimethoxy-ethane / 1.) r.t., 1 h, 2.) reflux, overnight
2: Et3N, MsCl / CH2Cl2 / 50 °C
3: 91 percent / 18-crown-6, Et3N / acetonitrile / Ambient temperature
4: 92 percent / concd aq. HCl / 8 h / Heating
5: 1.) HCl, 2.) 4-methylmorpholine, BOP / 1.) ether, r.t., 2 h, 2.) CH2Cl2, 0 deg C, 10 min; r.t., overnight
6: H2 / 10percent Pd/C / methanol / 3040 Torr / Ambient temperature
7: N,N-diisopropylethylamine / CH2Cl2 / Ambient temperature
With
4-methyl-morpholine; hydrogenchloride; sodium tetrahydroborate; 18-crown-6 ether; hydrogen; (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; methanesulfonyl chloride; triethylamine; N-ethyl-N,N-diisopropylamine; lithium iodide;
palladium on activated charcoal;
In
methanol; 1,2-dimethoxyethane; dichloromethane; acetonitrile;
DOI:10.1021/jo00088a022