Multi-step reaction with 13 steps
1: 60 percent / 2,2'-azobis-(2,4-dimethyl-4-methoxyvaleronitrile); Bu3SnH / diethyl ether / 1 h / 20 °C
2: H2 / Pd(OH)2/C / ethanol / 0.33 h / 20 °C
3: 626 mg / 3-(3-dimrthylaminopropyl)-1-ethylcarbodiimide hydrochloride / CH2Cl2 / 20 °C
4: NaOMe / methanol / 0.33 h / 20 °C
5: 485 mg / TsOH*H2O / dimethylformamide / 1 h / 20 °C
6: 88 percent / DMAP; DCC / CH2Cl2 / 7 h / 20 °C
7: 95 percent / TsOH*H2O / methanol / 2 h / 20 °C
8: 93 percent / pyridine / CH2Cl2 / 5 h / 20 °C
9: 94 percent / DMAP / CH2Cl2 / 4 h / 20 °C
10: 99 percent / H2 / Pd(en)/C / tetrahydrofuran / 3 h / 20 °C
11: 71 percent / diethylaminosulfur trifluoride / CH2Cl2 / 0 °C
12: TFA / CH2Cl2 / 4 h / 20 °C
13: 35.6 mg / H2 / Pd(OH)2/C / ethanol / 2 h / 20 °C
With
pyridine; dmap; 2,2’-azobis(4-methoxy-2,4-dimethyl)valeronitrile; diethylamino-sulfur trifluoride; hydrogen; tri-n-butyl-tin hydride; sodium methylate; toluene-4-sulfonic acid; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; dicyclohexyl-carbodiimide; trifluoroacetic acid;
palladium dihydroxide; Pd(en)/C;
In
tetrahydrofuran; methanol; diethyl ether; ethanol; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1016/S0008-6215(01)00290-7