Multi-step reaction with 15 steps
1: oxalyl chloride in DMSO, Et3N
2: LDA / tetrahydrofuran / -78 °C
3: 71 percent / NaN3, 15-crown-5 / hexamethylphosphoric acid triamide / 100 °C
4: 100 percent / NaBH4 / ethanol
5: 100 percent / i-Pr2EtN / CH2Cl2
6: H2 / 10percent Pd/C / ethanol
7: pyridine
8: 86 percent / NaBH3CN, TMSCl / acetonitrile
9: oxalyl chloride in DMSO, Et3N
10: NaClO2, NH2SO3H / dioxane; H2O
11: diethyl ether
12: DDQ / CH2Cl2; H2O
13: oxalyl chloride in DMSO, Et3N
14: 65 percent / n-BuLi / 2-methyl-propan-2-ol; tetrahydrofuran
15: 50 percent / p-TsOH*H2O / ethanol; H2O
With
pyridine; sodium chlorite; sodium tetrahydroborate; n-butyllithium; chloro-trimethyl-silane; sodium azide; oxalyl dichloride; 15-crown-5; aminosulfonic acid; hydrogen; sodium cyanoborohydride; toluene-4-sulfonic acid; dimethyl sulfoxide; triethylamine; N-ethyl-N,N-diisopropylamine; 2,3-dicyano-5,6-dichloro-p-benzoquinone; lithium diisopropyl amide;
palladium on activated charcoal;
In
tetrahydrofuran; 1,4-dioxane; N,N,N,N,N,N-hexamethylphosphoric triamide; diethyl ether; ethanol; dichloromethane; water; acetonitrile; tert-butyl alcohol;
DOI:10.1248/cpb.42.994