Multi-step reaction with 7 steps
1: 97 percent / dimethylformamide / 2 h / 130 °C
2: 85 percent / H2 / 10percent Pd/C / tetrahydrofuran / 0.58 h / 2585.7 Torr
3: 95 percent / aq. LiOH / tetrahydrofuran; methanol / 6 h / 60 °C
4: 1.) 1,1'-carbonyldiimidazole / 1.) CH2Cl2, reflux, 30 min, 2.) CH2Cl2, reflux, 30 min
5: 1.) NaH / 1.) DMF, 0 deg C, 1 h, 2.) DMF, RT, 24 h
6: 50 percent / aq. LiOH / methanol; tetrahydrofuran
7: 63 percent / Me2N(CH2)3N=C=NEt*HCl, DMAP / CH2Cl2
With
dmap; lithium hydroxide; hydrogen; sodium hydride; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; 1,1'-carbonyldiimidazole;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1021/jm00091a010