Trifluoromethanesulfonic anhydride → 4-nitrobenzyl (5R, 6R)-6-[1-methyl-1-(4-nitrobenzyloxycarbonyloxy)ethyl]-3-(5-methyl-1,3,4-oxadiazol-2-ylthio)-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

HRID 235773ノート

反応式

HRID 235773 の反応式
C(N(C(C)C)CC)(C)C.O=[C:11]1[CH2:17][C@H:16]2[N:13]([C:14](=[O:35])[C@H:15]2[C:18]([CH3:34])([O:20][C:21]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][C:28]([N+:31]([O-:33])=[O:32])=[CH:27][CH:26]=2)=[O:22])[CH3:19])[C@H:12]1[C:36]([O:38][CH2:39][C:40]1[CH:45]=[CH:44][C:43]([N+:46]([O-:48])=[O:47])=[CH:42][CH:41]=1)=[O:37].FC(F)(F)S(OS(C(F)(F)F)(=O)=O)(=O)=O.[CH3:64][C:65]1[O:69][C:68]([SH:70])=[N:67][N:66]=1>C(Cl)Cl.CN(C1C=CN=CC=1)C>[CH3:19][C:18]([C@@H:15]1[C:14](=[O:35])[N:13]2[C@@H:16]1[CH2:17][C:11]([S:70][C:68]1[O:69][C:65]([CH3:64])=[N:66][N:67]=1)=[C:12]2[C:36]([O:38][CH2:39][C:40]1[CH:41]=[CH:42][C:43]([N+:46]([O-:48])=[O:47])=[CH:44][CH:45]=1)=[O:37])([O:20][C:21]([O:23][CH2:24][C:25]1[CH:30]=[CH:29][C:28]([N+:31]([O-:33])=[O:32])=[CH:27][CH:26]=1)=[O:22])[CH3:34]

参加物

7

反応物 4

HCID 67749Trifluoromethanesulfonic anhydrideHCID 81531Diisopropylethylamine2 回HCID 185992114-nitrobenzyl (2R,5R,6R)-3,7-dioxo-6-[1-methyl-1-(4-nitrobenzyloxycarbonyloxy)ethyl]-1-azabicyclo[3.2.0]heptane-2-carboxylateHCID 178434159HCID 178434159、化合物

生成物 1

HCID 867412954-nitrobenzyl (5R, 6R)-6-[1-methyl-1-(4-nitrobenzyloxycarbonyloxy)ethyl]-3-(5-methyl-1,3,4-oxadiazol-2-ylthio)-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate収率 70.1%

試薬・触媒・溶媒 2

HCID 142844-(Dimethylamino)pyridine触媒HCID 6344Dichloromethane溶媒4 回

実験手順

A solution of N,N-diisopropyl-N-ethylamine (0.135 ml) in methylene chloride (1.21 ml) was added to a solution of 4-nitrobenzyl (2R, 5R, 6R)-3,7-dioxo-6-[1-methyl-1-(4-nitrobenzyloxycarbonyloxy)ethyl]-1-azabicyclo[3.2.0]heptane-2-carboxylate (350 mg) and 4-(N,N-dimethylamino)pyridine (7.9 mg) in methylene chloride (17.5 ml) at -30° C. A solution of trifluoromethanesulfonic anhydride (0.114 ml) in methylene chloride (1.02 ml) was added to the mixture and stirring was continued at the same temperature for 30 minutes. A solution of N,N-diisopropyl-N-ethylamine (0.563 ml) in methylene chloride (5.06 ml) and 5-methyl-1,3,4-oxadiazole-2-thiol (225 mg) were then added thereto, and the reaction mixture was stirred at -30° C. for 30 minutes and allowed to warm to ambient temperature over a period of an hour. After stirring at ambient temperature for 4 hours, the mixture was allowed to stand at 5° C. for 14 hours. After the solvent was removed by evaporation, the residue was dissolved in ethyl acetate (20 ml). The organic solution was washed in turn with water and a saturated aqueous sodium chloride, dried over magnesium sulfate and evaporated in vacuo. The residue was chromatographed on deactivated silica gel with 10% water (7 g), eluting with a mixture of benzene and acetone (20:1 to 10:1) to give 4-nitrobenzyl (5R, 6R)-6-[1-methyl-1-(4-nitrobenzyloxycarbonyloxy)ethyl]-3-(5-methyl-1,3,4-oxadiazol-2-ylthio)-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (290 mg) as an oil.

後処理

  1. stirringthe reaction mixture was stirred at -30° C. for 30 minutes
  2. stirringAfter stirring at ambient temperature for 4 hours
  3. waitto stand at 5° C. for 14 hours
  4. customAfter the solvent was removed by evaporation
  5. dissolutionthe residue was dissolved in ethyl acetate (20 ml)
  6. washThe organic solution was washed in turn with water
  7. dry with materiala saturated aqueous sodium chloride, dried over magnesium sulfate
  8. customevaporated in vacuo
  9. customThe residue was chromatographed on deactivated silica gel with 10% water (7 g)
  10. washeluting with a mixture of benzene and acetone (20:1 to 10:1)

出典と根拠

ORDレコード
ord-2de3d7a471584fbbbd04e64cbbbc9337
出典データセット
uspto-grants-1987_02
特許番号
US04640915

反応ノート

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