4-Methylmorpholine → N-{[4-((2R,3R)-1-(4-Fluorophenyl)-3-{[2-(4-fluorophenyl)-2-hydroxyethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}-D-seryl-D-serine

HRID 254028Notes

Reaction equation

HRID 254028 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][CH:15]([C:17]3[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=3)[OH:16])[C@H:9]2[C:24]2[CH:40]=[CH:39][C:27]([O:28][CH2:29][C:30](N[C@@H](C(O)=O)CO)=[O:31])=[CH:26][CH:25]=2)=[CH:4][CH:3]=1.Cl.C([O:46][C:47](=[O:56])[C@@H:48]([CH2:50][O:51]C(C)(C)C)[NH2:49])(C)(C)C.C[N:58]1[CH2:63][CH2:62][O:61]CC1.CN([C:67]([O:71]N1N=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]([C:17]3[CH:18]=[CH:19][C:20]([F:23])=[CH:21][CH:22]=3)[OH:16])[C@H:9]2[C:24]2[CH:40]=[CH:39][C:27]([O:28][CH2:29][C:30]([NH:58][C@@H:63]([C:67]([NH:49][C@@H:48]([C:47]([OH:46])=[O:56])[CH2:50][OH:51])=[O:71])[CH2:62][OH:61])=[O:31])=[CH:26][CH:25]=2)=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 79724-MethylmorpholineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 56777372H-D-Ser(tBu)-OtBu.HClHCID 66842695N-{[4-((2R,3R)-1-(4-fluorophenyl)-3-([2-(4-fluorophenyl)-2-hydroxyethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}-D-serine

Product 1

HCID 66842863N-{[4-((2R,3R)-1-(4-Fluorophenyl)-3-{[2-(4-fluorophenyl)-2-hydroxyethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}-D-seryl-D-serineYield 54.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of N-{[4-((2R,3R)-1-(4-fluorophenyl)-3-{[2-(4-fluorophenyl)-2-hydroxyethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}-D-serine (0.008 g, 0.014 mmol), O-tert-butyl-D-serine tert-butyl ester hydrochloride (0.005 g, 0.019 mmol) and N-Methylmorpholine (0.006 ml, 0.055 mmol) in DCM (3 ml) was stirred for 5 min. TBTU (0.008 g, 0.025 mmol) was added. After 3 days the conversion to the ester (M/z: 772.5) was complete and the mixture was concentrated under reduced pressure. The residue was dissolved in formic acid (3 ml) and the solution was stirred at RT for 26 h. The mixture was concentrated under reduced pressure and the residue was dissolved in MeOH (4 ml) and TEA (1 ml). The solution was stirred at 40° C. for 6 h. The solvent was removed under reduced pressure. The residue was purified by preparative HPLC using a gradient of 20-50% MeCN in 0.1M ammonium acetate buffer as eluent. After freeze-drying, 0.005 g (52% yield) of the title compound was obtained as a white solid. M/z: 660.1. 1H NMR (DMSO, 400 MHz): δ 2.83-0.95 (m, 2H), 3.42-3.66 (m, 4), 3.91-4.01 (m, 1H), 4.25-4.31 (m, 1H), 4.32-4.39 (m, 1H), 4.54 (ABq, 2H), 4.68-4.76 (m, 1H), 5.02-5.06 (m, 1H), 5.68 (bs, 1H), 6.94-7.00 (m, 2H), 7.05-7.18 (m, 4H), 7.19-7.26 (m, 2H), 7.29-7.39 (m, 4H), 7.74-7.81 (m, 1H), 7.99 (d, 1H).

Workup

  1. concentrationthe mixture was concentrated under reduced pressure
  2. dissolutionThe residue was dissolved in formic acid (3 ml)
  3. concentrationThe mixture was concentrated under reduced pressure
  4. dissolutionthe residue was dissolved in MeOH (4 ml)
  5. stirringThe solution was stirred at 40° C. for 6 h
  6. customThe solvent was removed under reduced pressure
  7. customThe residue was purified by preparative HPLC
  8. customAfter freeze-drying

Sources & evidence

ORD record
ord-b3fc3f3f1fff441e9222367bd6a203ee
Source dataset
uspto-grants-2011_01
Patent number
US07871998B2

Reaction notes

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