Multi-step reaction with 18 steps
1: 88 percent / n-BuLi / tetrahydrofuran / -70 °C
2: 88 percent / tetrapropylammonium perruthenate; 4-methylmorpholine / CH2Cl2
3: NaBH4 / methanol / 0 °C
4: TEA / CH2Cl2 / 0 °C
5: NaN3 / dimethylformamide / 50 °C
6: PPh3; water / tetrahydrofuran / 20 °C
7: TEA / tetrahydrofuran / 0 °C
8: n-Bu4NF / tetrahydrofuran / 0 °C
9: TEA / CH2Cl2 / 0 °C
10: NaN3 / dimethylformamide / 20 °C
11: PPh3; H20 / tetrahydrofuran / 20 °C
12: TEA / tetrahydrofuran / 0 °C
13: p-TsOH / methanol / 20 °C
14: TEA / CH2Cl2 / 0 °C
15: 97 percent / t-BuOK / tetrahydrofuran / -20 °C
16: 87 percent / dimethylformamide / 65 - 70 °C
17: NaOH / methanol / 0 °C
18: i-Pr2EtN / acetonitrile / 0 °C
With
4-methyl-morpholine; sodium hydroxide; sodium tetrahydroborate; n-butyllithium; sodium azide; tetrapropylammonium perruthennate; TEA; potassium tert-butylate; tetrabutyl ammonium fluoride; water; toluene-4-sulfonic acid; N-ethyl-N,N-diisopropylamine; triphenylphosphine;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide; acetonitrile;
DOI:10.1248/cpb.48.310