Multi-step reaction with 10 steps
1: 1.) 5percent aq. NaHCO3, aq. NaIO4, 2.) 6 M aq. K2CO3, tetrabutylammonium bromide / 1.) 1 h, 2.) CH2Cl2, RT, 4 h
2: 84 percent / NaBH4, NiCl2*6H2O / methanol / 1 h / Ambient temperature
3: 43 percent / CaCl2 / 20 h / 35 °C / α-chymotrypsin
4: 1.) dicyclohexylcarbodiimide, 2.) N-hydroxysuccinimide, 3.) aq. NH3
5: 65 percent / Lawesson's reagent / 1,2-dimethoxy-ethane / 0 °C
6: 1.) KHCO3, 2.) trifluoroacetic anhydride, pyridine / 1.) DME, 0 deg C, 10 min, 2.) DME, 2 h
7: 93 percent / 70percent AcOH / Ambient temperature
8: 95 percent / Et3N, 4-dimethylaminopyridine / CH2Cl2 / 0.5 h / 0 °C
9: 98 percent / (i-Pr)2NEt / CH2Cl2 / 8 h / Ambient temperature
10: 97 percent / n-Bu4NF / tetrahydrofuran / 2 h / Ambient temperature
With
Lawessons reagent; pyridine; dmap; ammonium hydroxide; sodium tetrahydroborate; sodium periodate; 1-hydroxy-pyrrolidine-2,5-dione; tetrabutyl ammonium fluoride; tetrabutylammomium bromide; sodium hydrogencarbonate; potassium carbonate; potassium hydrogencarbonate; acetic acid; triethylamine; N-ethyl-N,N-diisopropylamine; dicyclohexyl-carbodiimide; trifluoroacetic anhydride; calcium chloride; nickel dichloride;
In
tetrahydrofuran; methanol; 1,2-dimethoxyethane; dichloromethane;
DOI:10.1246/bcsj.68.3151