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Chemical Structure| 147489-06-3 Chemical Structure| 147489-06-3
Chemical Structure| 147489-06-3

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Product Details of Pitavastatin Impurity 5

CAS No. :147489-06-3
Formula : C32H36FNO4
M.W : 517.63
SMILES Code : O=C(OC(C)(C)C)C[C@H](OC(C)(O1)C)C[C@H]1/C=C/C2=C(C3=CC=C(F)C=C3)C4=CC=CC=C4N=C2C5CC5
MDL No. :MFCD12911897
InChI Key :GTJPCLUSFUIHTP-KAAYJFPCSA-N
Pubchem ID :11060359

Safety of Pitavastatin Impurity 5

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Application In Synthesis of Pitavastatin Impurity 5

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Upstream synthesis route of [ 147489-06-3 ]

[ 147489-06-3 ] Synthesis Path-Upstream   1~1

  • 1
  • [ 147489-06-3 ]
  • [ 586966-54-3 ]
YieldReaction ConditionsOperation in experiment
88.4% With hydrogenchloride; water In acetonitrile for 3 h; Large scale The compound prepared in Example 1 (1.5 kg) was added to acetonitrile (16 L). A mixed solution of a 35percent HCl solution (0.91 kg) and purified water (9.5 kg) was slowly added over 2 hours to the mixture under stirring. The reaction mixture was stirred for additional 1 hour. After confirming with HPLC that the starting material was exhausted, the reaction was quenched. The reaction mixture was neutralized with sodium bicarbonate and then extracted with ethyl acetate. The separated organic layer was washed with a sodium chloride solution (1.5 kg) and then concentrated under reduced pressure. The resulting residue was dissolved in ethyl acetate (1.5 L) and then hexane (9 L) was slowly added thereto. The reaction mixture was cooled to about 10° C. and then stirred for 2 hours. The resulting precipitate was isolated by filtering under reduced pressure and then dried under reduced pressure at about 50° C. to give the titled compound (1.22 kg) as a white crystalline form (Yield: 88.4percent).[0062]HPLC percent Area: 98.555percent
27 g With hydrogenchloride; water In acetonitrile at 25 - 55℃; EXAMPLE-lOPREPARATION OF tert.-BUTYL (3R,5S,6E)-7-[2-CYCLOPROPYL-4-(4-• FLUOROPHENYL)QUINOLIN-3-YL]-3,5-DfflYDROXY-6-HEPTENOATE [tertBUTYL PITAVASTATIN]Diprotected tert-butyl Pitavastatin (30 g, 0.058 mole) was suspended in acetonitrile (210 ml) and water (70 ml) at 25-30°C. The pH of the reaction mass was adjusted to 2.5 with dilute hydrochloric acid (0.1 molar). Thereafter, the reaction mass was heated to 50-55°C and progress of the reaction was monitored by HPLC After completion of reaction, pH of the reaction mass was adjusted to 8.5 with aqueous ammonia and stirred for 30 mm. Product was filtered and dried at 40-45°C under reduced pressure to obtain title compound.Yield: 27gChromatographic Purity (by HPLC): 99.6percent, Lactone diastereomer: 0.09percent
References: [1] Patent: US2013/72688, 2013, A1, . Location in patent: Paragraph 0060-0062.
[2] Patent: US2012/16129, 2012, A1, . Location in patent: Page/Page column 13-14.
[3] Patent: WO2014/108795, 2014, A2, . Location in patent: Page/Page column 19; 20.
[4] Patent: JP6231262, 2017, B2, . Location in patent: Paragraph 0030-0032.
 

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