Multi-step reaction with 7 steps
1: 1.) acetic anhydride / 1.) 40 deg C, 30 min, 2.) r.t., 2 h
2: 1.) NaOAc; phosphate buffer, wheat bran, 2.) 1M HCl / 1.) H2O, 18 h, pH 6.5, 2.) CH2Cl2, H2O, 20 deg C, 14 h, pH 2.8
3: 38 percent / Et3N / tetrahydrofuran / 8 h / 50 °C
4: 62 percent / m-CPBA / ethyl acetate; tetrahydrofuran / 0.5 h / 0 °C
5: PCl3 / dimethylformamide / -20 °C
6: 12M HCl / tetrahydrofuran; methanol / Ambient temperature
7: 1.) 1-hydroxybenzotriazole, DCC / 1.) DMF, 1 h, 2.) DMF
With
hydrogenchloride; phosphate buffer; wheat bran; sodium acetate; acetic anhydride; benzotriazol-1-ol; triethylamine; 3-chloro-benzenecarboperoxoic acid; dicyclohexyl-carbodiimide; phosphorus trichloride;
In
tetrahydrofuran; methanol; ethyl acetate; N,N-dimethyl-formamide;
DOI:10.7164/antibiotics.47.1507