Cesium carbonate → 4-{(S)-2-[(4-Benzyloxycarbonylmethoxy-7-methyl-quinoline-2-carbonyl)-amino]-3-tert-butoxycarbonyl-propionyl}-piperazine-1-carboxylic acid ethyl ester

HRID 1185446Notes

Reaction equation

HRID 1185446 reaction equation
[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:37])[C@@H:13]([NH:22][C:23]([C:25]2[CH:34]=[C:33]([OH:35])[C:32]3[C:27](=[CH:28][C:29]([CH3:36])=[CH:30][CH:31]=3)[N:26]=2)=[O:24])[CH2:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:8][CH2:7]1)=[O:5])[CH3:2].[CH2:38]([O:45][C:46](=[O:49])[CH2:47]Br)[C:39]1[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C.O>[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:37])[C@@H:13]([NH:22][C:23]([C:25]2[CH:34]=[C:33]([O:35][CH2:47][C:46]([O:45][CH2:38][C:39]3[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=3)=[O:49])[C:32]3[C:27](=[CH:28][C:29]([CH3:36])=[CH:30][CH:31]=3)[N:26]=2)=[O:24])[CH2:14][C:15]([O:17][C:18]([CH3:20])([CH3:21])[CH3:19])=[O:16])[CH2:8][CH2:7]1)=[O:5])[CH3:2]

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 62576Benzyl bromoacetateHCID 178473394HCID 178473394, compound

Product 1

HCID 685988154-{(S)-2-[(4-Benzyloxycarbonylmethoxy-7-methyl-quinoline-2-carbonyl)-amino]-3-tert-butoxycarbonyl-propionyl}-piperazine-1-carboxylic acid ethyl ester

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a solution of 3 g of 4-{(S)-3-tert-Butoxycarbonyl-2-[(4-hydroxy-7-methyl-quinoline-2-carbonyl)-amino]-propionyl}-piperazine-1-carboxylic acid ethyl ester and 1.5 g of Bromo-acetic acid benzyl ester in 38 ml of DMF, 2 g of cesium carbonate was added. The reaction mixture was stirred for 4 h at RT, diluted with water and extracted with ethyl acetate. The organic phase was dried over MgSO4 and the solvents were removed under reduced pressure. The crude product was purified by chromatography on silica gel eluting with a gradient of n-heptane/ethyl acetate. The fractions containing the product were combined and the solvent evaporated under reduced pressure. Yield: 2.8 g.

Workup

  1. extractionextracted with ethyl acetate
  2. dry with materialThe organic phase was dried over MgSO4
  3. customthe solvents were removed under reduced pressure
  4. customThe crude product was purified by chromatography on silica gel eluting with a gradient of n-heptane/ethyl acetate
  5. additionThe fractions containing the product
  6. customthe solvent evaporated under reduced pressure

Sources & evidence

ORD record
ord-7107ea6162814b90bdee1ae91c3e9f51
Source dataset
uspto-grants-2014_03
Patent number
US08669266B2

Reaction notes

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