Multi-step reaction with 11 steps
1: 1.) ethyl chloroformate, N-methylmorpholine / 1.) THF, 0 deg C, 3 h, 2.) THF, ether, room temp., overnight
2: H2O, silver benzoate, Et3N / 2-methyl-propan-2-ol / Ambient temperature
3: 56 percent / bis(2-oxo-3-oxazolidinyl)phosphinic chloride, N-methylmorpholine / CH2Cl2
4: 140 mg / CF3COOH, anisole / 2 h / Ambient temperature
5: 43 percent / O-benzotriazol-1-yl-N,N,N'N'-tetramethyluronium tetrafluoroborate, N,N-diisopropylethylamine / CH2Cl2 / 48 h
6: 84 mg / methanol; CH2Cl2 / 0.17 h / 0 °C
7: 38 percent / Et3N / dioxane; H2O / Ambient temperature
8: 99 percent / CF3COOH, anisole / 1 h / Ambient temperature
9: 30 percent / Et3N / CH2Cl2 / 4 h / Ambient temperature
10: 6.0 mg / CF3COOH, anisole / 1 h / Ambient temperature
11: 100 percent / H2 / PdCl2 / methanol; CH2Cl2 / 0.17 h
With
4-methyl-morpholine; water; hydrogen; silver benzoate; bis-(2-oxo-3-oxazolidinyl)phosphoryl chloride; chloroformic acid ethyl ester; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; methoxybenzene; triethylamine; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid;
palladium dichloride;
In
1,4-dioxane; methanol; dichloromethane; water; tert-butyl alcohol;
DOI:10.1021/ja972670j