Triethyl phosphite → (1R,5S,6S)-2-[(4R)-pyrrolidine-2-thion-4-ylthio]-6-[(1R)-1-hydroxyethyl]-1-methyl-carbapen-2-em-3-carboxylic acid sodium salt

HRID 1708522Notes

Reaction equation

HRID 1708522 reaction equation
C(=O)([O-])O.[Na+:5].CC1(C)CC(=O)CC(=O)C1.P(OCC)(OCC)OCC.C([O:29][C:30]([C:32]1[N:36]2[C:37](=[O:42])[C@H:38]([C@H:39]([OH:41])[CH3:40])[C@H:35]2[C@@H:34]([CH3:43])[C:33]=1[S:44][C@H:45]1[CH2:49][NH:48][C:47](=[S:50])[CH2:46]1)=[O:31])C=C>O.C([O-])(=O)C.C([O-])(=O)C.[Pd+2].O1CCCC1>[Na+:5].[NH:48]1[CH2:49][C@H:45]([S:44][C:33]2[C@H:34]([CH3:43])[C@@H:35]3[C@@H:38]([C@H:39]([OH:41])[CH3:40])[C:37](=[O:42])[N:36]3[C:32]=2[C:30]([O-:31])=[O:29])[CH2:46][C:47]1=[S:50]

Participants

8

Reactant 4

HCID 31215Triethyl phosphiteHCID 31358DimedoneHCID 516892Sodium BicarbonateHCID 10571982HCID 10571982, compound

Product 1

HCID 23689827(1R,5S,6S)-2-[(4R)-pyrrolidine-2-thion-4-ylthio]-6-[(1R)-1-hydroxyethyl]-1-methyl-carbapen-2-em-3-carboxylic acid sodium saltYield 90%

Reagents, catalysts & solvents 3

HCID 167845palladium(II) acetateCatalystHCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

A mixture of sodium hydrogen carbonate (0.84 g) in water (10 ml), dimedone (0.84 g) and tetrahydrofuran (80 ml) is treated with ultrasonics, and thereto is added palladium diacetate (0.11 g) and triethyl phosphite (0.58 g) under nitrogen atmosphere, and the mixture is stirred for three minutes. To the mixture is added (1R,5S,6S)-2-[(4R)-pyrrolidine-2-thion-4-ylthio]-6-[(1R)-1-hydroxyethyl]-1-methylcarbapen-2-em-3-carboxylic acid allyl ester (3.83 g), and the mixture is stirred at 35°-37° C. for 45 minutes. The mixture is stirred at 5° C. for 30 minutes, and the precipitated crystals are collected by filtration, washed with tetrahydrofuran, and dried under reduced pressure to give (1R,5S,6S)-2-[(4R)-pyrrolidine-2-thion-4-ylthio]-6-[(1R)-1-hydroxyethyl]-1-methyl-carbapen- 2-em-3-carboxylic acid sodium salt (3.28 g).

Workup

  1. additionis treated with ultrasonics
  2. stirringthe mixture is stirred at 35°-37° C. for 45 minutes
  3. stirringThe mixture is stirred at 5° C. for 30 minutes
  4. filtrationthe precipitated crystals are collected by filtration
  5. washwashed with tetrahydrofuran
  6. customdried under reduced pressure

Sources & evidence

ORD record
ord-6528f2662cb549b4b9d1296290a6d8f1
Source dataset
uspto-grants-1994_10
Patent number
US05359059

Reaction notes

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