Acetic Anhydride → 6-[acetoxy-(5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester

HRID 1744970ノート

反応式

HRID 1744970 の反応式
[CH3:1][O:2][C:3]1[C:14]2[CH2:13][CH2:12][CH2:11][C:10]=2[N:9]2[C:5](=[N:6][C:7]([CH:15]=[O:16])=[CH:8]2)[N:4]=1.[Br-].[Mg+2].[Br-].[N+:20]([C:23]1[CH:41]=[CH:40][C:26]([CH2:27][O:28][C:29]([C:31]2[N:32]3[CH:35]([S:36][CH:37]=2)[CH:34]([Br:38])[C:33]3=[O:39])=[O:30])=[CH:25][CH:24]=1)([O-:22])=[O:21].[C:42](OC(=O)C)(=[O:44])[CH3:43]>C(OCC)(=O)C.C(N(CC)CC)C.C1COCC1.C(#N)C>[N+:20]([C:23]1[CH:41]=[CH:40][C:26]([CH2:27][O:28][C:29]([C:31]2[N:32]3[CH:35]([S:36][CH:37]=2)[C:34]([CH:15]([O:16][C:42](=[O:44])[CH3:43])[C:7]2[N:6]=[C:5]4[N:9]([C:10]5[CH2:11][CH2:12][CH2:13][C:14]=5[C:3]([O:2][CH3:1])=[N:4]4)[CH:8]=2)([Br:38])[C:33]3=[O:39])=[O:30])=[CH:25][CH:24]=1)([O-:22])=[O:21]

参加物

9

反応物 4

HCID 7918Acetic AnhydrideHCID 82241Magnesium BromideHCID 222245485-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carbaldehydeHCID 684433356-Bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester

生成物 1

HCID 687056406-[acetoxy-(5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester収率 93%

試薬・触媒・溶媒 4

HCID 6342Acetonitrile溶媒HCID 8028Tetrahydrofuran溶媒HCID 8471Triethylamine溶媒HCID 8857Ethyl Acetate溶媒

反応条件

温度
23 °C

実験手順

A 30 ml acetonitrile solution of 5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carbaldehyde (660 mg, 3 mmol) was added 1.03 gram of magnesium bromide etherate. The mixture was stirred at 23° C. for half an hour. Then a 30 ml dry THF solution of the 6-Bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.155 gram, 1 eq.) was injected within a minute and the reaction mixture was then cooled to −20° C. Triethylamine (0.7 ml, eq.) was then injected and the reaction mixture was stirred for five hours at −20° C. Then acetic anhydride (0.377 ml, eq.) was injected and the reaction mixture was left at zero degree for 18 hours. The reaction media was then diluted with 400 ml ethyl acetate and washed with 100 ml 5% citric acid, 100 ml saturated sodium bicarbonate, and 100 ml brine. The organic layer was then dried over magnesium sulfate, filtered and concentrated. Flash column chromatography using 20% ethyl acetate in hexane gave 1.8 gram product. (93% Yield); MP: 118.7–119.1° C.; MS: 645.9 (M+H)

後処理

  1. temperaturethe reaction mixture was then cooled to −20° C
  2. stirringthe reaction mixture was stirred for five hours at −20° C
  3. customThe reaction media
  4. washwashed with 100 ml 5% citric acid, 100 ml saturated sodium bicarbonate, and 100 ml brine
  5. dry with materialThe organic layer was then dried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated

出典と根拠

ORDレコード
ord-463be108d05b4b8e8bd2170c91c84864
出典データセット
uspto-grants-2006_03
特許番号
US07018997B2

反応ノート

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