4-Methylmorpholine → N-{[4-((2R,3R)-1-(4-fluorophenyl)-3-{[2-hydroxy-2-(4-methoxyphenyl)ethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}glycyl-D-alanine

HRID 254042Notes

Reaction equation

HRID 254042 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]([O:23][CH3:24])=[CH:19][CH:18]=3)=[O:16])[C@H:9]2[C:25]2[CH:39]=[CH:38][C:28]([O:29][CH2:30][C:31]([NH:33][CH2:34][C:35](O)=[O:36])=[O:32])=[CH:27][CH:26]=2)=[CH:4][CH:3]=1.CN1CCOCC1.Cl.[NH2:48][C@@H:49]([C:51]([O:53]C(C)(C)C)=[O:52])[CH3:50].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:3]=[CH:4][C:5]([N:8]2[C:11](=[O:12])[C@H:10]([S:13][CH2:14][CH:15]([OH:16])[C:17]3[CH:22]=[CH:21][C:20]([O:23][CH3:24])=[CH:19][CH:18]=3)[C@H:9]2[C:25]2[CH:39]=[CH:38][C:28]([O:29][CH2:30][C:31]([NH:33][CH2:34][C:35]([NH:48][C@@H:49]([C:51]([OH:53])=[O:52])[CH3:50])=[O:36])=[O:32])=[CH:27][CH:26]=2)=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 79724-MethylmorpholineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 16211919D-Alanine tert-butyl ester hydrochlorideHCID 66842806N-{[4-((2R,3R)-1-(4-fluorophenyl)-3-{[2-(4-methoxyphenyl)-2-oxoethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}glycine

Product 1

HCID 66842770N-{[4-((2R,3R)-1-(4-fluorophenyl)-3-{[2-hydroxy-2-(4-methoxyphenyl)ethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}glycyl-D-alanineYield 66.6%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

N-{[4-((2R,3R)-1-(4-Fluorophenyl)-3-{[2-(4-methoxyphenyl)-2-oxoethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}glycine (0.04 g, 0.072 mmol) and N-methylmorpholine (0.022 g, 0.217 mmol) were dissolved in CH2Cl2 (4 ml). tert-Butyl D-alaninate hydrochloride (0.016 g, 0.087 mmol) and TBTU (0.030 g, 0.094 mmol) were added. After 2 h, the reaction mixture was purified on silica gel and eluted with EtOAc/CH2Cl2 (25/75). Pure fractions were collected and concentrated. The residue was dissolved in CH2Cl2 (3 ml) and TFA (2 ml). The hydrolysis was completed after 2 h. The reaction mixture was concentrated and MeOH (3 ml) and NABH4 (0.011 g, 0.290 mmol) were added. The mixture was stirred for 5 minutes. The reaction was quenched by the addition of 0.1M NH4OAc buffer (2 ml) and the solvent evaporated. The residue was purified by preparative HPLC using an eluent of 0-50% CH3CN in 0.1M NH4OAc buffer. Freeze-drying of the pure fractions afforded the title compound (0.030 g, 66%) as a colourless solid. M/z: 624.2, (M−1). 1H NMR [(CD3)2SO), 400 MHz] δ 1.16 (d, 3H), 2.83-2.93 (m, 2H), 3.68-3.74 (m, 5H), 3.88-3.95 (m, 1H), 4.23-4.26 (m, 1H), 4.51 (s, 2H), 4.60-4.70 (m, 1H), 5.00-5.03 (m, 1H), 6.81-7.37 (m, 12H), 7.74-7.79 (m, 1H), 8.29-8.34 (m, 1H).

Workup

  1. customthe reaction mixture was purified on silica gel
  2. washeluted with EtOAc/CH2Cl2 (25/75)
  3. customPure fractions were collected
  4. concentrationconcentrated
  5. dissolutionThe residue was dissolved in CH2Cl2 (3 ml)
  6. waitThe hydrolysis was completed after 2 h
  7. concentrationThe reaction mixture was concentrated
  8. additionMeOH (3 ml) and NABH4 (0.011 g, 0.290 mmol) were added
  9. customThe reaction was quenched by the addition of 0.1M NH4OAc buffer (2 ml)
  10. customthe solvent evaporated
  11. customThe residue was purified by preparative HPLC
  12. customFreeze-drying of the pure fractions

Sources & evidence

ORD record
ord-231b3e82c52c41d4a614b0a56dfa0714
Source dataset
uspto-grants-2011_01
Patent number
US07871998B2

Reaction notes

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