Phosphorus oxychloride → 7-[2-(2-Formamidothiazol-4-yl)-2-propargyloxyiminoacetamido]-3-chloro-3-cephem-4-carboxylic acid

HRID 544077

反応式

HRID 544077 の反応式
[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:13][O:14][CH2:15][C:16]#[CH:17])[C:10]([OH:12])=O)[N:8]=1)=[O:2].P(Cl)(Cl)(Cl)=O.Cl.[NH2:24][CH:25]1[C:36](=[O:37])[N:27]2[C:28]([C:33]([OH:35])=[O:34])=[C:29]([Cl:32])[CH2:30][S:31][C@H:26]12.C[Si](CC(N)=O)(C)C.C[Si](C([Si](C)(C)C)C(N)=O)(C)C>C(OCC)(=O)C.O.CN(C)C=O>[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:13][O:14][CH2:15][C:16]#[CH:17])[C:10]([NH:24][CH:25]2[C:36](=[O:37])[N:27]3[C:28]([C:33]([OH:35])=[O:34])=[C:29]([Cl:32])[CH2:30][S:31][C@H:26]23)=[O:12])[N:8]=1)=[O:2]

参加物

9

反応物 5

HCID 24813Phosphorus oxychlorideHCID 357676Acetamide, 2-(trimethylsilyl)-HCID 11708267BistrimethylsilylacetamidHCID 537194582-(2-Formamidothiazol-4-yl)-2-(propargyloxyimino)acetic acidHCID 703622557-Amino-3-chloro-3-cephem-4-carboxylic acid hydrochloride

生成物 1

HCID 1317125027-[2-(2-Formamidothiazol-4-yl)-2-propargyloxyiminoacetamido]-3-chloro-3-cephem-4-carboxylic acid収率 63.7%

試薬・触媒・溶媒 3

HCID 962Water溶媒HCID 6228Dimethylformamide溶媒HCID 8857Ethyl Acetate溶媒2 回

実験手順

2-(2-Formamidothiazol-4-yl)-2-propargyloxyiminoacetic acid (syn isomer, 1.27 g.), N,N-dimethylformamide (400 mg.), phosphoryl chloride (850 mg.) and ethyl acetate (11.2 ml.) were treated in a conventional manner to give the activated acid solution. The activated acid solution was added to a solution of 7-amino-3-chloro-3-cephem-4-carboxylic acid hydrochloride (2 g.), trimethylsilylacetamide (6 g.) and bis(trimethylsilyl)acetamide (3 ml.) in ethyl acetate (40 ml.) at -15° C. all at once, and stirred at -5° to -10° C. for 1.5 hours. After adding water (30 ml.) to the resultant solution, the ethyl acetate layer was separated and extracted with a saturated aqueous solution of sodium bicarbonate. Ethyl acetate was added to the aqueous extract, adjusted to pH 2.0 with 10% hydrochloric acid. The ethyl acetate layer was separated, washed with water, dried over magnesium sulfate and filtered. The filtrate was concentrated in vacuo, and the residue was crystallized with a mixture of ethyl acetate and diisopropyl ether. The precipitates were collected by filtration and dried to give 7-[2-(2-formamidothiazol-4-yl)-2-propargyloxyiminoacetamido]-3-chloro-3-cephem-4-carboxylic acid (syn isomer, 1.5 g.), yellow powder.

後処理

  1. customto give the activated acid solution
  2. customthe ethyl acetate layer was separated
  3. extractionextracted with a saturated aqueous solution of sodium bicarbonate
  4. additionEthyl acetate was added to the aqueous extract
  5. customThe ethyl acetate layer was separated
  6. washwashed with water
  7. dry with materialdried over magnesium sulfate
  8. filtrationfiltered
  9. concentrationThe filtrate was concentrated in vacuo
  10. customthe residue was crystallized with a mixture of ethyl acetate and diisopropyl ether
  11. filtrationThe precipitates were collected by filtration
  12. customdried

出典と根拠

ORDレコード
ord-b2e701d06b6745a8a898ede582560ea4
出典データセット
uspto-grants-1984_05
特許番号
US04447430

関連ノート

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