Methyl chloroacetate → (2S,4R)-4-amino-5-biphenyl-4-yl-2-hydroxymethyl-2-methyl-pentanoic acid methoxycarbonylmethyl ester

HRID 523411Notes

Reaction equation

HRID 523411 reaction equation
[CH3:1][O:2][C:3](=[O:6])[CH2:4]Cl.[C:7]1([C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)[CH:12]=[CH:11][C:10]([CH2:13][C@@H:14]([NH:23]C(OC(C)(C)C)=O)[CH2:15][C@:16]([CH2:21][OH:22])([CH3:20])[C:17]([OH:19])=[O:18])=[CH:9][CH:8]=1.CCN(CC)CC>CC(C)=O>[CH3:1][O:2][C:3]([CH2:4][O:19][C:17](=[O:18])[C@@:16]([CH2:21][OH:22])([CH3:20])[CH2:15][C@H:14]([NH2:23])[CH2:13][C:10]1[CH:11]=[CH:12][C:7]([C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)=[CH:8][CH:9]=1)=[O:6]

Participants

5

Reactant 3

HCID 7295Methyl chloroacetateHCID 8471TriethylamineHCID 68181022(2S,4R)-5-Biphenyl-4-yl-4-t-butoxycarbonylamino-2-hydroxymethyl-2-methyl-pentanoic acid

Product 1

HCID 68181051(2S,4R)-4-amino-5-biphenyl-4-yl-2-hydroxymethyl-2-methyl-pentanoic acid methoxycarbonylmethyl ester

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

Chloroacetic acid methyl ester (34 μL, 387 μmol) was added to a mixture of (2S,4R)-5-biphenyl-4-yl-4-t-butoxycarbonylamino-2-hydroxymethyl-2-methyl-pentanoic acid (100 mg, 242 μmol) and Et3N (35 μL, 254 μmol) in acetone (10 mL). The mixture was refluxed for 24 hours and the reaction monitored for completion. When the reaction was complete, the product was purified ((Interchim reverse phase chromatography column) the solvent was removed under vacuum to yield (2S,4R)-4-amino-5-biphenyl-4-yl-2-hydroxymethyl-2-methyl-pentanoic acid methoxycarbonylmethyl ester.

Workup

  1. temperatureThe mixture was refluxed for 24 hours
  2. customthe product was purified ((Interchim reverse phase chromatography column) the solvent
  3. customwas removed under vacuum

Sources & evidence

ORD record
ord-0885db602a6f4f1aa53c1776a0a42481
Source dataset
uspto-grants-2016_05
Patent number
US09334245B2

Reaction notes

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