Multi-step reaction with 8 steps
1: 4-methylmorpholine / CH2Cl2 / 0.75 h / -15 °C
2: CH2Cl2 / 3 h / -15 °C
3: tetrahydrofuran; diethyl ether / 1 h / -78 - 0 °C
4: 1.) NaH / 1.) THF, 0 deg C, 2 h, 2.) THF, RT, 2 h
5: H2 / 10percent Pd/C / ethyl acetate / 760 Torr
6: DMAP, iPr2NEt, 1-<3-(dimethylamino)propyl>-3-ethylcarbodiimide hydrochloride / CH2Cl2 / Ambient temperature
7: TEA, pyridine, H2S gas / Ambient temperature
8: 1.) MeI, 2.) NH4OAc / 1.) acetone, reflux, 1 h, 2.) MeOH, reflux, 2 h
With
4-methyl-morpholine; pyridine; dmap; TEA; hydrogen sulfide; ammonium acetate; hydrogen; sodium hydride; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine; methyl iodide;
palladium on activated charcoal;
In
tetrahydrofuran; diethyl ether; dichloromethane; ethyl acetate;
DOI:10.1021/jm970020k