Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1) → Ethyl (2S)-3-[3-({(3R)-N-[(benzyloxy)carbonyl]-4,4,4-trifluorovalyl}amino)-4-fluorophenyl]-2-methylpropanoate

HRID 626427Notes

Reaction equation

HRID 626427 reaction equation
[CH2:1]([O:8][C:9]([NH:11][C@H:12]([C:19]([OH:21])=O)[C@H:13]([C:15]([F:18])([F:17])[F:16])[CH3:14])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH2:22][C:23]1[CH:24]=[C:25]([CH2:30][C@H:31]([CH3:37])[C:32]([O:34][CH2:35][CH3:36])=[O:33])[CH:26]=[CH:27][C:28]=1[F:29].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C=O)C.N1C=CC=CC=1.C(OCC)(=O)C>[CH2:1]([O:8][C:9]([NH:11][C@H:12]([C:19]([NH:22][C:23]1[CH:24]=[C:25]([CH2:30][C@H:31]([CH3:37])[C:32]([O:34][CH2:35][CH3:36])=[O:33])[CH:26]=[CH:27][C:28]=1[F:29])=[O:21])[C@H:13]([C:15]([F:16])([F:17])[F:18])[CH3:14])=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 3

HCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 58288322(+)-ethyl (2S)-3-(3-amino-4-fluorophenyl)-2-methylpropanoateHCID 118106631(3R)-N-[(Benzyloxy)carbonyl]-4,4,4-trifluorovaline

Product 1

HCID 131735217Ethyl (2S)-3-[3-({(3R)-N-[(benzyloxy)carbonyl]-4,4,4-trifluorovalyl}amino)-4-fluorophenyl]-2-methylpropanoate

Reagents, catalysts & solvents 3

HCID 1049PyridineSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

0.87 g (2.85 mmol) of (3R)—N-[(benzyloxy)carbonyl]-4,4,4-trifluorovaline (diastereomer mixture) and 0.77 g (3.42 mmol) of (+)-ethyl (2S)-3-(3-amino-4-fluorophenyl)-2-methylpropanoate were dissolved in a mixture of 5 ml of DMF and 2.5 ml of pyridine, and 1.41 g (3.71 mmol) of HATU were added at RT. The reaction mixture was stirred at RT overnight and then diluted with ethyl acetate. The mixture was washed successively with 1 N hydrochloric acid, sat. sodium bicarbonate solution and sat. sodium chloride solution, dried over magnesium sulphate and concentrated under reduced pressure. The crude product was purified by chromatography on silica gel (mobile phase cyclohexane/ethyl acetate 6:1). This gave 1.27 g of the target product (87.2% of theory, diastereomer ratio about 4.8:1).

Workup

  1. additionwere added at RT
  2. washThe mixture was washed successively with 1 N hydrochloric acid, sat. sodium bicarbonate solution and sat. sodium chloride solution
  3. dry with materialdried over magnesium sulphate
  4. concentrationconcentrated under reduced pressure
  5. customThe crude product was purified by chromatography on silica gel (mobile phase cyclohexane/ethyl acetate 6:1)

Sources & evidence

ORD record
ord-8f7399f3a6444e13a02dbdc8dba35764
Source dataset
uspto-grants-2016_04
Patent number
US09309198B2

Reaction notes

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