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N-methyl-N-(trimethylsilyl)trifluoroacetamide → Trimethylsilyl 7-benzamido-3-bromomethyl-3-cephem-4-carboxylate-1-oxide

HRID 1902919
ノート
印刷プレビュー

反応式

HRID 1902919 の反応式
[C:1]([NH:9][CH:10]1[C:22](=[O:23])[N:12]2[C:13]([C:19]([OH:21])=[O:20])=[C:14]([CH3:18])[CH2:15][S:16](=[O:17])[C@H:11]12)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CN([Si:32]([CH3:35])([CH3:34])[CH3:33])C(=O)C(F)(F)F.[Br:36]N1C(=O)CCC1=O>ClCCl>[C:1]([NH:9][CH:10]1[C:22](=[O:23])[N:12]2[C:13]([C:19]([O:21][Si:32]([CH3:35])([CH3:34])[CH3:33])=[O:20])=[C:14]([CH2:18][Br:36])[CH2:15][S:16](=[O:17])[C@H:11]12)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1
参加物実験手順後処理出典と根拠反応ノート

参加物

5

反応物 3

HCID 32510N-methyl-N-(trimethylsilyl)trifluoroacetamideHCID 67184N-bromobutanimideHCID 704647027-Benzamido-3-methyl-3-cephem-4-carboxylic acid-1-oxide

生成物 1

HCID 70463851Trimethylsilyl 7-benzamido-3-bromomethyl-3-cephem-4-carboxylate-1-oxide収率 52%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

To a suspension of 335 mg (1.00 mmole) of 7-benzamido-3-methyl-3-cephem-4-carboxylic acid-1-oxide in 25 ml of dichloromethane, 279 mg of N-methyl-N-trimethylsilyltrifluoroacetamide (1.40 mmoles) were added and the mixture was stirred for 10 minutes at room temperature to obtain a clear, yellow solution. This was cooled in an ice-bath and bromination was carried out in half an hour using 253 mg of N-bromosuccinimide (1.42 mmoles) as the brominating agent to obtain a yield of 52% of trimethylsilyl 7-benzamido-3-bromomethyl-3-cephem-4-carboxylate-1-oxide.

後処理

  1. additionwere added
  2. customto obtain a clear, yellow solution
  3. temperatureThis was cooled in an ice-bath
  4. waitbromination was carried out in half an hour

出典と根拠

ORDレコード
ord-903a72fe00cb4f15a7f4287073194db3
出典データセット
uspto-grants-1982_12
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US04366315

反応ノート

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