Multi-step reaction with 12 steps
1.1: 88 percent / PPh3; DEAD / tetrahydrofuran / 20 h / 0 - 20 °C
2.1: 89 percent / H2NNH2 / ethanol / 7 h / Heating
3.1: 99 percent / NEt3 / CH2Cl2 / 20 °C
4.1: 97 percent / POCl3; 2,4,6-collidine / acetonitrile / 3 h / 85 °C
5.1: LiAlH4; Me3Al / tetrahydrofuran; hexane / -78 - 20 °C
6.1: NaH / tetrahydrofuran
6.2: 85 percent / tetrahydrofuran / -78 °C
7.1: 93 percent / NEt3 / CH2Cl2 / 20 °C
8.1: 89 percent / I2; PhI(O2CCF3)2 / CH2Cl2 / -10 - 0 °C
9.1: 99 percent / TBAF / tetrahydrofuran / 2 h / 20 °C
10.1: 99 percent / DCC / CH2Cl2 / 14 h / 20 °C
11.1: 81 percent / K3PO4; 2,6-di-tert-butyl-4-methylphenol / [Pd(dppf)Cl2] / dimethylformamide / 117 °C
12.1: 85 percent / NaOH; MeOH / 20 °C
With
2,4,6-trimethyl-pyridine; methanol; sodium hydroxide; potassium phosphate; lithium aluminium tetrahydride; 2,6-di-tert-butyl-4-methyl-phenol; tetrabutyl ammonium fluoride; iodine; trimethylaluminum; sodium hydride; triethylamine; dicyclohexyl-carbodiimide; triphenylphosphine; bis-[(trifluoroacetoxy)iodo]benzene; hydrazine; diethylazodicarboxylate; trichlorophosphate;
[1,1'-bis(diphenylphosphino)ferrocene]dichloropalladium(II);
In
tetrahydrofuran; ethanol; hexane; dichloromethane; N,N-dimethyl-formamide; acetonitrile;
1.1: Mitsunobu reaction / 2.1: Hydrazinolysis / 3.1: Acetylation / 4.1: Bischler-Napieralski cyclization / 5.1: Reduction / 6.1: Metallation / 6.2: Etherification / 7.1: Tosylation / 8.1: Iodination / 9.1: Desilylation / 10.1: Esterification / 11.1: Arylation / 12.1: Saponification;
DOI:10.1002/(SICI)1521-3773(19991203)38:23<3530::AID-ANIE3530>3.0.CO;2-W