Atorvastatin → Atorvastatin

HRID 1518933Notes

Reaction equation

HRID 1518933 reaction equation
[CH3:1][CH:2]([C:4]1[N:8]([CH2:9][CH2:10][C@@H:11]([OH:19])[CH2:12][C@@H:13]([OH:18])[CH2:14][C:15]([OH:17])=[O:16])[C:7]([C:20]2[CH:21]=[CH:22][C:23]([F:26])=[CH:24][CH:25]=2)=[C:6]([C:27]2[CH:28]=[CH:29][CH:30]=[CH:31][CH:32]=2)[C:5]=1[C:33]([NH:35][C:36]1[CH:37]=[CH:38][CH:39]=[CH:40][CH:41]=1)=[O:34])[CH3:3]>CC(O)C>[CH3:3][CH:2]([C:4]1[N:8]([CH2:9][CH2:10][C@@H:11]([OH:19])[CH2:12][C@@H:13]([OH:18])[CH2:14][C:15]([OH:17])=[O:16])[C:7]([C:20]2[CH:25]=[CH:24][C:23]([F:26])=[CH:22][CH:21]=2)=[C:6]([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[C:5]=1[C:33]([NH:35][C:36]1[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=1)=[O:34])[CH3:1].[CH2:9]([NH:8][CH2:7][CH2:6][C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)[C:10]1[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=1

Participants

4

Reactant 1

HCID 60823Atorvastatin2×

Product 2

HCID 60823AtorvastatinHCID 65055N-Benzylphenethylamine

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent3×

Procedure

The benethamine salt of atorvastatin (Form B) was synthesized by preparing a stock solution of the free acid of atorvastatin (U.S. Pat. No. 5,273,995) in 2-propanol (IPA) (1 g in 40 mL of IPA). A solution of N-benzyl-2-phenylethylamine (benethamine) was prepared by dissolving 388.68 mg (1.1 equivalents) in 2-propanol (100 mL). The stock solution of atorvastatin free acid was added to the counterion solution with stirring. Seed crystals of the benethamine salt were added. The mixture was reduced to a wet solid under a nitrogen bleed, and the resulting solids were slurried in 2-propanol (40 mL). After 7 days of stirring at ambient temperature, the solids were isolated by vacuum filtration using a Buchner funnel fitted with a paper filter (#2 Whatman). The solids were rinsed with 2-propanol (25 mL), and placed in a 25° C. oven under nitrogen to dry overnight to afford atorvastatin benethamine Form B.

Workup

  1. stirringAfter 7 days of stirring at ambient temperature
  2. customthe solids were isolated by vacuum filtration
  3. customfitted with a paper
  4. filtrationfilter (#2 Whatman)
  5. washThe solids were rinsed with 2-propanol (25 mL)
  6. customplaced in a 25° C.
  7. customto dry overnight

Sources & evidence

ORD record
ord-f9aa84148d13414c98840e18ce65575e
Source dataset
uspto-grants-2015_07
Patent number
US09073852B2

Reaction notes

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