Diisopropylethylamine → (2S,3R)-benzyl 2-((S)-2-((tert-butoxycarbonyl)amino)-3-hydroxypropanamido)-3-hydroxy-3-(4-methoxyphenyl)propanoate

HRID 58809

Reaction equation

HRID 58809 reaction equation
CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C.[NH2:34][C@@H:35]([C@H:46]([OH:55])[C:47]1[CH:52]=[CH:51][C:50]([O:53][CH3:54])=[CH:49][CH:48]=1)[C:36]([O:38][CH2:39][C:40]1[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=1)=[O:37].[NH:56]([C:63]([O:65][C:66]([CH3:69])([CH3:68])[CH3:67])=[O:64])[C@H:57]([C:60](O)=[O:61])[CH2:58][OH:59]>CN(C=O)C>[C:66]([O:65][C:63]([NH:56][C@@H:57]([CH2:60][OH:61])[C:58]([NH:34][C@@H:35]([C@H:46]([OH:55])[C:47]1[CH:52]=[CH:51][C:50]([O:53][CH3:54])=[CH:49][CH:48]=1)[C:36]([O:38][CH2:39][C:40]1[CH:41]=[CH:42][CH:43]=[CH:44][CH:45]=1)=[O:37])=[O:59])=[O:64])([CH3:69])([CH3:68])[CH3:67]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 98766N-[tert-butoxycarbonyl]-L-serineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 117607803(2S,3R)-benzyl 2-amino-3-hydroxy-3-(4-methoxyphenyl)propanoate

Product 1

HCID 131737019(2S,3R)-benzyl 2-((S)-2-((tert-butoxycarbonyl)amino)-3-hydroxypropanamido)-3-hydroxy-3-(4-methoxyphenyl)propanoateYield 93.8%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Sequentially HATU (645 mg, 1.70 mmol) and DIEA (0.99 mL, 5.7 mmol) were added to a 0° C. solution of (2S,3R)-benzyl 2-amino-3-hydroxy-3-(4-methoxyphenyl)propanoate (HCl salt, 477 mg, 1.41 mmol) and Boc-Ser-OH (290 mg, 1.41 mmol) in DMF (8 mL). The reaction mixture was allowed to warm to ambient temperature and stirred for 30 min. The mixture was concentrated and the residue was purified by flash column chromatography on silica gel (petroleum ether/EtOAc=2:1) twice to afford (2S,3R)-benzyl 2-((S)-2-((tert-butoxycarbonyl)amino)-3-hydroxypropanamido)-3-hydroxy-3-(4-methoxyphenyl)propanoate (646 mg, 93% yield) as a colorless solid.

Workup

  1. concentrationThe mixture was concentrated
  2. customthe residue was purified by flash column chromatography on silica gel (petroleum ether/EtOAc=2:1) twice

Sources & evidence

ORD record
ord-514e7be395af4c72920394a73b5673db
Source dataset
uspto-grants-2016_09
Patent number
US09434761B2

Linked notes

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