Multi-step reaction with 27 steps
1: 2,4,6-collidine / CH2Cl2 / -78 °C
2: imidazole / dimethylformamide / 25 °C
3: K2CO3 / methanol / 25 °C
4: TPAP; NMO; MS-4 Angstroem / CH2Cl2 / 25 °C
5: LDA / tetrahydrofuran / -78 °C
6: TBAF / tetrahydrofuran / 25 °C
7: LiOH / H2O; tetrahydrofuran / 0 °C
8: pyridine / 25 °C
9: 88 percent / DBU / benzene / 25 °C
10: 89 percent / diethyl ether / 0 °C
11: LiAlH4 / diethyl ether / 0 - 25 °C
12: n-Bu4NI; NaH / tetrahydrofuran / 0 - 25 °C
13: CSA / methanol / 25 °C
14: 2,4,6-collidine / CH2Cl2 / -78 °C
15: 2,6-lutidine / CH2Cl2 / 0 °C
16: Zn(AcO)2 / triethylamine; acetic acid; 2,2,4-trimethyl-pentane / reflux
17: K2CO3 / methanol / 25 °C
18: 2,6-lutidine / CH2Cl2 / -78 °C
19: 2,6-lutidine / CH2Cl2 / -78 °C
20: dimethylsulfoxide / 35 °C
21: 2,6-lutidine / CH2Cl2 / 0 °C
22: DIBAH / CH2Cl2 / -78 °C
23: toluene / 100 °C
24: 93 percent / DIBAH / toluene / -78 °C
25: 85 percent / t-BuOOH; (-)-DIPT; Ti(i-PrO)4,MS-4 Angstroem / CH2Cl2 / -20 °C
26: TPAP; NMO; MS-4 Angstroem / CH2Cl2 / 25 °C
27: tetrahydrofuran / 0 °C
With
pyridine; 1H-imidazole; 2,6-dimethylpyridine; 2,4,6-trimethyl-pyridine; tert.-butylhydroperoxide; lithium hydroxide; lithium aluminium tetrahydride; N-methyl-2-indolinone; tetrapropylammonium perruthennate; MS-4 Angstroem; Ti(i-PrO)4,MS-4 Angstroem; zinc diacetate; tetrabutyl ammonium fluoride; tetra-(n-butyl)ammonium iodide; sodium hydride; diisobutylaluminium hydride; potassium carbonate; D-(-)-diisopropyl tartrate; 1,8-diazabicyclo[5.4.0]undec-7-ene; lithium diisopropyl amide;
camphor-10-sulfonic acid;
In
tetrahydrofuran; methanol; 2,2,4-trimethylpentane; diethyl ether; dichloromethane; water; acetic acid; dimethyl sulfoxide; triethylamine; N,N-dimethyl-formamide; toluene; benzene;
1: Acetylation / 2: silylation / 3: Hydrolysis / 4: Oxidation / 5: Addition / 6: ether cleavage / 7: Hydrolysis / 8: Cyclization / 9: Elimination / 10: Addition / 11: Reduction / 12: Alkylation / 13: Hydrolysis / 14: Acetylation / 15: Acylation / 16: ring-expansion / 17: Hydrolysis / 18: Acylation / 19: silylation / 20: Substitution / 21: silylation / 22: Reduction / 23: Condensation / 24: Reduction / 25: Epoxidation / 26: Oxidation / 27: Condensation;
DOI:10.1016/S0040-4039(00)01340-X