Sodium triacetoxyborohydride → 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-(3,3-dimethylmorpholino)butan-2-yl)-3-methyl-2-oxopiperidin-3-yl)acetic acid

HRID 932161Notes

Reaction equation

HRID 932161 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:8]2[C@@H:13]([C:14]3[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][CH:15]=3)[N:12]([C@@H:21]([CH2:24][CH3:25])[CH:22]=O)[C:11](=[O:26])[C@:10]([CH2:28][C:29]([OH:31])=[O:30])([CH3:27])[CH2:9]2)[CH:5]=[CH:6][CH:7]=1.Cl.[CH3:33][C:34]1([CH3:40])[CH2:39][O:38][CH2:37][CH2:36][NH:35]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl.[NH4+].[Cl-]>[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:8]2[C@@H:13]([C:14]3[CH:15]=[CH:16][C:17]([Cl:20])=[CH:18][CH:19]=3)[N:12]([C@@H:21]([CH2:24][CH3:25])[CH2:22][N:35]3[CH2:36][CH2:37][O:38][CH2:39][C:34]3([CH3:40])[CH3:33])[C:11](=[O:26])[C@:10]([CH2:28][C:29]([OH:31])=[O:30])([CH3:27])[CH2:9]2)[CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 223428633,3-Dimethylmorpholine hydrochlorideHCID 585738802-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxo-1-((S)-1-oxobutan-2-yl)piperidin-3-yl)acetic acid

Product 1

HCID 585738742-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-(3,3-dimethylmorpholino)butan-2-yl)-3-methyl-2-oxopiperidin-3-yl)acetic acid

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 25517Ammonium ChlorideSolvent

Procedure

To a solution of 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxo-1-((S)-1-oxobutan-2-yl)piperidin-3-yl)acetic acid (70 mg, 0.151 mmol; Example 210, Step A) in DCE (3 mL) was added 45.9 mg (0.303 mmol) of 3,3-dimethylmorpholine hydrochloride (Cottle, D.; Jeltsch, A.; Stoudt, T.; Walters, D. Journal of Organic Chemistry. 1946, 11(3), 286-91; Note: reference is for the free base) and sodium triacetoxyborohydride (64.2 mg, 0.303 mmol). After stirring overnight, the mixture was diluted with sat. aq. NH4Cl solution. The mixture was extracted with DCM (2×). The combined organic layers were washed with sat. aq. NaCl solution, dried over anhydrous Na2SO4, filtered and the filtrate was concentrated. The residue was purified by preparative thin layer chromatography on silica gel (eluent: 50% ethyl acetate/hexanes). The product containing fractions were pooled, concentrated and repurified by preparative thin layer chromatography on silica gel (eluent: 10% MeOH/DCM) to afford the title compound.

Workup

  1. extractionThe mixture was extracted with DCM (2×)
  2. washThe combined organic layers were washed with sat. aq. NaCl solution
  3. dry with materialdried over anhydrous Na2SO4
  4. filtrationfiltered
  5. concentrationthe filtrate was concentrated
  6. customThe residue was purified by preparative thin layer chromatography on silica gel (eluent: 50% ethyl acetate/hexanes)
  7. additionThe product containing fractions
  8. concentrationconcentrated
  9. customrepurified by preparative thin layer chromatography on silica gel (eluent: 10% MeOH/DCM)

Sources & evidence

ORD record
ord-eea310d4c18a4683b1f9c3331912876e
Source dataset
uspto-grants-2016_03
Patent number
US09296736B2

Reaction notes

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