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Acetamide, N-(trimethylsilyl)- → 7-[2-(2-Tritylaminothiazol-4-yl)-2-difluoromethoxyiminoacetamido]-3-(1,3,4-thiadiazol-2-yl)thiomethyl-3-cephem-4-carboxylic acid

HRID 34494
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HRID 34494 반응식
[C:1]([NH:20][C:21]1[S:22][CH:23]=[C:24]([C:26](=[N:30][O:31][CH:32]([F:34])[F:33])[C:27](O)=[O:28])[N:25]=1)([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(N(C(C)C)CC)(C)C.S(Cl)(C)(=O)=O.[NH2:49][CH:50]1[C:67](=[O:68])[N:52]2[C:53]([C:64]([OH:66])=[O:65])=[C:54]([CH2:57][S:58][C:59]3[S:60][CH:61]=[N:62][N:63]=3)[CH2:55][S:56][C@H:51]12.C[Si](C)(C)NC(=O)C.C(=O)(O)[O-].[Na+]>CN(C)C=O.O1CCCC1.O>[C:1]([NH:20][C:21]1[S:22][CH:23]=[C:24]([C:26](=[N:30][O:31][CH:32]([F:33])[F:34])[C:27]([NH:49][CH:50]2[C:67](=[O:68])[N:52]3[C:53]([C:64]([OH:66])=[O:65])=[C:54]([CH2:57][S:58][C:59]4[S:60][CH:61]=[N:62][N:63]=4)[CH2:55][S:56][C@H:51]23)=[O:28])[N:25]=1)([C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1)([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)[C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1
참가 물질실험 절차후처리출처 및 근거반응 노트

참가 물질

10

반응물 6

HCID 25989Acetamide, N-(trimethylsilyl)-HCID 31297Methanesulfonyl chlorideHCID 81531DiisopropylethylamineHCID 516892Sodium BicarbonateHCID 128891877-Amino-3-(1,3,4-thiadiazol-2-ylthiomethyl)-3cephem-4-carboxylic acidHCID 536668022-(2-Tritylamino-4-thiazolyl)-2-difluoromethoxyimino-acetic acid

생성물 1

HCID 1317156677-[2-(2-Tritylaminothiazol-4-yl)-2-difluoromethoxyiminoacetamido]-3-(1,3,4-thiadiazol-2-yl)thiomethyl-3-cephem-4-carboxylic acid수율 83.3%

시약·촉매·용매 3

HCID 962Water용매HCID 6228Dimethylformamide용매HCID 8028Tetrahydrofuran용매

실험 절차

To a solution of 2-(2-tritylaminothiazol-4-yl)-2difluoromethoxyiminoacetic acid (syn isomer) (0.8 g) and diisopropylethylamine (0.43 g) in N,N-dimethylformamide (20 ml) was added mesyl chloride (0.38 g) at -20° C. and the mixture was stirred at the same temperature for 30 minutes to give an activated acid solution. To a solution of 7-amino-3-(1,3,4-thiadiazol-2-yl)thiomethyl-3-cephem-4-carboxylic acid (0.57 g) and N-trimethylsilylacetamide (1.8 g) in tetrahydrofuran (20 ml) was added the activated acid solution obtained above all at once at -10° C. After being stirred at the same temperature for an hour, the mixture was poured into water and adjusted to pH 2.5 with an aqueous solution of sodium bicarbonate. The precipitates were collected by filtration and washed with water to give 7-[2-(2-tritylaminothiazol-4-yl)-2-difluoromethoxyiminoacetamido]-3-(1,3,4-thiadiazol-2-yl)thiomethyl-3-cephem-4-carboxylic acid (syn isomer) (1.1 g).

후처리

  1. customto give an activated acid solution
  2. customobtained above all at once at -10° C
  3. stirringAfter being stirred at the same temperature for an hour
  4. filtrationThe precipitates were collected by filtration
  5. washwashed with water

출처 및 근거

ORD 기록
ord-ce8d558ac081456ba95239ad58a7474c
출처 데이터셋
uspto-grants-1988_08
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US04761410

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