p-Toluenesulfonic acid → HCID 178494566, compound

HRID 1654632Notes

Reaction equation

HRID 1654632 reaction equation
[C:1]1(C)[CH:6]=[CH:5][C:4]([S:7]([OH:10])(=[O:9])=[O:8])=[CH:3][CH:2]=1.[NH2:12][C:13]1[S:14][CH:15]=[C:16](/[C:18](=[N:46]/[OH:47])/[C:19]([NH:21][CH:22]2[C:44](=[O:45])[N:24]3[C:25]([C:32]([O:34][CH:35]([O:37][C:38](=[O:43])[C:39]([CH3:42])([CH3:41])[CH3:40])[CH3:36])=[O:33])=[C:26]([CH2:29][O:30][CH3:31])[CH2:27][S:28][C@H:23]23)=[O:20])[N:17]=1.C(OC(C)C)(C)C>C(O)C>[C:3]1([CH3:13])[C:4]([S:7]([OH:10])(=[O:8])=[O:9])=[CH:5][CH:6]=[CH:1][CH:2]=1.[NH2:12][C:13]1[S:14][CH:15]=[C:16](/[C:18](=[N:46]/[OH:47])/[C:19]([NH:21][CH:22]2[C:44](=[O:45])[N:24]3[C:25]([C:32]([O:34][CH:35]([O:37][C:38](=[O:43])[C:39]([CH3:41])([CH3:42])[CH3:40])[CH3:36])=[O:33])=[C:26]([CH2:29][O:30][CH3:31])[CH2:27][S:28][C@H:23]23)=[O:20])[N:17]=1

Participants

5

Reactant 3

HCID 6101p-Toluenesulfonic acidHCID 7914Diisopropyl EtherHCID 14459633HCID 14459633, compound

Product 1

HCID 178494566HCID 178494566, compound

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent2×

Procedure

A solution of 2.1 g (11 mmol ) of p-toluenesulfonic acid in 5 ml of ethanol was added dropwise to a solution of 5 g (9.3 mmol) of α-(2,2-dimethylpropanoyloxy)ethyl 7-[2-(2-aminothiazol-4-yl)-2-(Z)-hydroxyimino-acetamido]-3-methoxymethyl-3-cephem-4-carboxylate in 32 ml of ethanol. After stirring at room temperature for 30 minutes, a total of 280 ml of diisopropyl ether were added to the crystal magma formed and the mixture was briefly stirred. The precipitate formed was then filtered off with suction and washed with a little diisopropyl ether, and the residue was dried in vacuo over calcium chloride/paraffin. 5.4 g of the desired crystalline title compound were obtained, which consisted of an approximately 1:1 mixture of the two diastereomers according to HPLC and was identical in its physical and chemical properties with the product from working example 2.

Workup

  1. customformed
  2. stirringthe mixture was briefly stirred
  3. customThe precipitate formed
  4. filtrationwas then filtered off with suction
  5. washwashed with a little diisopropyl ether
  6. dry with materialthe residue was dried in vacuo over calcium chloride/paraffin

Sources & evidence

ORD record
ord-18c7b84009e74d12989c1e6d1c325065
Source dataset
uspto-grants-1995_04
Patent number
US05409918

Reaction notes

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