Dichloromethane → Ethyl 2-(bromoethoxyimino)-2-(2-tritylamino-4-thiazolyl)-acetate

HRID 2049171ノート

反応式

HRID 2049171 の反応式
C(=O)([O-])[O-].[K+].[K+].Cl.[C:8]([NH:27][C:28]1[S:29][CH:30]=[C:31]([C:33](=[N:39][OH:40])[C:34]([O:36][CH2:37][CH3:38])=[O:35])[N:32]=1)([C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1)([C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.[Br:41][CH2:42][CH2:43]Br.C(Cl)Cl>CN(C)C=O.O>[Br:41][CH2:42][CH2:43][O:40][N:39]=[C:33]([C:31]1[N:32]=[C:28]([NH:27][C:8]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)([C:15]2[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=2)[C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)[S:29][CH:30]=1)[C:34]([O:36][CH2:37][CH3:38])=[O:35]

参加物

7

反応物 4

HCID 6344DichloromethaneHCID 78391,2-DibromoethaneHCID 11430Potassium CarbonateHCID 78408569Ethyl 2-(2-tritylamino-4-thiazolyl)-2-hydroxyimino-acetate hydrochloride

生成物 1

HCID 53679114Ethyl 2-(bromoethoxyimino)-2-(2-tritylamino-4-thiazolyl)-acetate

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 6228Dimethylformamide溶媒

反応条件

温度
20 °C

実験手順

4.14 g of potassium carbonate were added over 3 minutes under argon to a mixture of 4.94 g of the product of Step B in 10 ml of dimethylformamide and the mixture was stirred at 20° C. for 20 minutes. 8.65 ml of 1,2-dibromoethane were added to the mixture which was then stirred for 30 hours and poured into a mixture of 20 ml of methylene chloride and 100 ml of distilled water. The mixture was decanted and the aqueous phase was reextracted with methylene chloride. The combined organic phases were washed with distilled water, dried and vacuum filtered. The filter was rinsed and the filtrate was evaporated to dryness. The raw residue was chromatographed over silica gel and was eluted with benzene containing 5% ether. The first fraction was dissolved at 50° to 60° C. in methanol and the mixture was cooled to 0° to 5° C. and was vacuum filtered to obtain 1.16 g of the syn isomer of ethyl 2-(2-bromoethoxyimino)-2-(2-tritylamino-4-thiazolyl)-acetate in the form of cream-white crystals melting at 117° C. and a second homogenous fraction of 1.258 g of the said product was obtained.

後処理

  1. stirringwas then stirred for 30 hours
  2. customThe mixture was decanted
  3. washThe combined organic phases were washed with distilled water
  4. customdried
  5. filtrationvacuum filtered
  6. washThe filter was rinsed
  7. customthe filtrate was evaporated to dryness
  8. customThe raw residue was chromatographed over silica gel
  9. washwas eluted with benzene containing 5% ether
  10. dissolutionThe first fraction was dissolved at 50° to 60° C. in methanol
  11. temperaturethe mixture was cooled to 0° to 5° C.
  12. filtrationfiltered

出典と根拠

ORDレコード
ord-a60b955e859b4d5e9313a068713be654
出典データセット
uspto-grants-1980_04
特許番号
US04196205

反応ノート

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