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ChemicalBook CAS DataBase List Pitavastatin Impurity 29
148516-15-8

Pitavastatin Impurity 29 synthesis

7synthesis methods
-

Yield:-

Steps:

Multi-step reaction with 9 steps
1: tri-n-butylphosphine / pyridine / Ambient temperature
2: 1.) tert-butyllithium / 1.) THF, 2.) THF, -78 deg C, 1 h
3: potassium hydroxide / tetrahydrofuran / 3.5 h / Ambient temperature
4: 100 percent / dimethylsulfoxide / 0.5 h / Ambient temperature
5: 67 percent / palladium(II) chloride, copper(II) chloride, NaOAc / 3 h / 760 Torr / Ambient temperature
6: H2 / Lindlar cat. / methanol / 25 h / Ambient temperature
7: pyridinium p-toluenesulfonate (PPTS) / toluene / 1.5 h / Heating
8: m-chloroperbenzoic acid (m-CPBA) / CH2Cl2 / 1.) -78 deg C, 1 h, 2.) -40 deg C, 30 min
9: calcium carbonate / toluene / 0.5 h / Heating

References:

Takano, Seiichi;Kamikubo, Takashi;Sugihara, Takumichi;Suzuki, Mikio;Ogasawara, Kunio [Tetrahedron Asymmetry,1993,vol. 4,# 2,p. 201 - 204]