4-Methylmorpholine → (2R)-({[4-((2R,3R)-1-(4-Fluorophenyl)-3-{[2-(4-fluorophenyl)-2-oxoethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl)amino)(phenyl)acetic acid

HRID 254070Notes

Reaction equation

HRID 254070 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:11](=[O:12])[C@H:10]([S:13][CH2:14][C:15]([C:17]3[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=3)=[O:16])[C@H:9]2[C:24]2[CH:34]=[CH:33][C:27]([O:28][CH2:29][C:30]([OH:32])=O)=[CH:26][CH:25]=2)=[CH:4][CH:3]=1.[NH2:35][C@H:36]([C:44]1[CH:49]=[CH:48][CH:47]=[CH:46][CH:45]=1)[C:37]([O:39]C(C)(C)C)=[O:38].CN1CCOCC1.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F>C(Cl)Cl>[F:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:11](=[O:12])[C@H:10]([S:13][CH2:14][C:15]([C:17]3[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=3)=[O:16])[C@H:9]2[C:24]2[CH:25]=[CH:26][C:27]([O:28][CH2:29][C:30]([NH:35][C@H:36]([C:44]3[CH:49]=[CH:48][CH:47]=[CH:46][CH:45]=3)[C:37]([OH:39])=[O:38])=[O:32])=[CH:33][CH:34]=2)=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 79724-MethylmorpholineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 7015059tert-butyl (2R)-2-amino-2-phenylacetateHCID 66842813[4-((2R,3R)-1-(4-Fluorophenyl)-3-{[2-(4-fluorophenyl)-2-oxoethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetic acid

Product 1

HCID 66842725(2R)-({[4-((2R,3R)-1-(4-Fluorophenyl)-3-{[2-(4-fluorophenyl)-2-oxoethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl)amino)(phenyl)acetic acid

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

[4-((2R,3R)-1-(4-Fluorophenyl)-3-{[2-(4-fluorophenyl)-2-oxoethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetic acid (0.40 g, 0.827 mmol) was dissolved in CH2Cl2 (40 ml) and tert-butyl (2R)-amino(phenyl)acetate (0.206 g, 0.993 mmol) and N-methylmorpholine (0.251 g, 2.48 mmol) were added. After 10 minutes, TBTU (0.345 g, 1.076 mmol) was added. The reaction was stirred overnight. The resulting tert-butyl ester was concentrated and purified on silica gel (eluted with EtOAc/CH2Cl2 25/75). The pure fractions were collected and concentrated. CH2Cl2 (25 ml) and TFA (3 ml) were added. The mixture was stirred for 5 days and the solvent was removed under reduced pressure. The residue was purified by preparative HPLC using a gradient of 20-70% CH3CN in 0.1M NH4OAc buffer. Freeze-drying of the pure fractions gave the title compound as a colourless solid. M/z: 615.50 (M−1). 1H NMR [(CD3)2SO), 400 MHz] δ 4.35 (d, 1H), 4.36 (d, 1H), 4.40 (d, 1H), 4.53 (d, 1H), 4.58 (d, 1H), 4.94 (d, 1H), 5.19 (d, 1H), 6.97-7.40 (m, 15H), 8.02-8.06 (m, 2H), 8.26-8.32 (m, 1H).

Workup

  1. concentrationThe resulting tert-butyl ester was concentrated
  2. custompurified on silica gel (eluted with EtOAc/CH2Cl2 25/75)
  3. customThe pure fractions were collected
  4. concentrationconcentrated
  5. additionCH2Cl2 (25 ml) and TFA (3 ml) were added
  6. stirringThe mixture was stirred for 5 days
  7. customthe solvent was removed under reduced pressure
  8. customThe residue was purified by preparative HPLC
  9. customFreeze-drying of the pure fractions

Sources & evidence

ORD record
ord-78976d77d3fb476185224e3c9b1b0b32
Source dataset
uspto-grants-2011_01
Patent number
US07871998B2

Reaction notes

Loading…