Acetic Acid → allyl (4R,5S,6S)-6-((1R)-1-hydroxyethyl)-4-methyl-3-methylthio-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

HRID 1464735ノート

反応式

HRID 1464735 の反応式
[Si]([O:8][C@@H:9]([C@H:11]1[C:17](=[O:18])[N:16]2[C@@H:12]1[C@@H:13]([CH3:27])[C:14]([S:25][CH3:26])=[C:15]2[C:19]([O:21][CH2:22][CH:23]=[CH2:24])=[O:20])[CH3:10])(C(C)(C)C)(C)C.[F-].C([N+](CCCC)(CCCC)CCCC)CCC.C(O)(=O)C>O1CCCC1.C(OCC)(=O)C>[OH:8][C@@H:9]([C@H:11]1[C:17](=[O:18])[N:16]2[C@@H:12]1[C@@H:13]([CH3:27])[C:14]([S:25][CH3:26])=[C:15]2[C:19]([O:21][CH2:22][CH:23]=[CH2:24])=[O:20])[CH3:10]

参加物

6

反応物 3

HCID 176Acetic AcidHCID 2724141Tetrabutylammonium FluorideHCID 57185440allyl (4R,5S,6S)-6-[(1R)-1-(tert-butyldimethylsilyloxy)ethyl]-4-methyl-3-methylthio-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

生成物 1

HCID 57069192allyl (4R,5S,6S)-6-((1R)-1-hydroxyethyl)-4-methyl-3-methylthio-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate収率 80.8%

試薬・触媒・溶媒 2

HCID 8028Tetrahydrofuran溶媒HCID 8857Ethyl Acetate溶媒

実験手順

Allyl (4R,5S,6S)-6-[(1R)-1-(tert-butyldimethylsilyloxy)ethyl]-4-methyl-3-methylthio-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (100 mg) was added to a mixture of 70% aqueous tetrabutylammonium fluoride (0.71 g) and acetic acid (121 mg) in tetrahydrofuran (2 ml) and the mixture was allowed to stand at ambient temperature for 24 hours. The solution was diluted with ethyl acetate (6 ml), washed with water, aqueous sodium bicarbonate solution and brine, and dried. The solvent was removed off under reduced pressure and the residue was crystallized from n-hexane to afford allyl (4R,5S,6S)-6-((1R)-1-hydroxyethyl)-4-methyl-3-methylthio-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (58.4 mg).

後処理

  1. washwashed with water, aqueous sodium bicarbonate solution and brine
  2. customdried
  3. customThe solvent was removed off under reduced pressure
  4. customthe residue was crystallized from n-hexane

出典と根拠

ORDレコード
ord-ad500ece2b014042ad68262e46bb326a
出典データセット
uspto-grants-1994_04
特許番号
US05306816

反応ノート

読み込み中…