Iodine → tert-butyl 3-((5-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octan-2-yl)-1,3,4-oxadiazol-2-yl)methyl)azetidine-1-carboxylate

HRID 1430709ノート

反応式

HRID 1430709 の反応式
C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.II.[CH2:22]([O:29][N:30]1[C:36](=[O:37])[N:35]2[CH2:38][C@H:31]1[CH2:32][CH2:33][C@H:34]2[C:39]([NH:41][NH:42][C:43](=O)[CH2:44][CH:45]1[CH2:48][N:47]([C:49]([O:51][C:52]([CH3:55])([CH3:54])[CH3:53])=[O:50])[CH2:46]1)=[O:40])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1>C(Cl)Cl>[CH2:22]([O:29][N:30]1[C:36](=[O:37])[N:35]2[CH2:38][C@H:31]1[CH2:32][CH2:33][C@H:34]2[C:39]1[O:40][C:43]([CH2:44][CH:45]2[CH2:48][N:47]([C:49]([O:51][C:52]([CH3:55])([CH3:53])[CH3:54])=[O:50])[CH2:46]2)=[N:42][N:41]=1)[C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1

参加物

5

反応物 3

HCID 807Iodine2 回HCID 11776TriphenylphosphineHCID 86701039tert-butyl 3-(2-(2-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza bicyclo[3.2.1]octane-2-carbonyl)hydrazinyl)-2-oxoethyl)azetidine-1-carboxylate

生成物 1

HCID 86701054tert-butyl 3-((5-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octan-2-yl)-1,3,4-oxadiazol-2-yl)methyl)azetidine-1-carboxylate収率 67.5%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

To a solution of PPh3 (2.2 g, 8.2 mmol) in dry DCM (60 mL) was added I2 (2.1 g, 8.2 mmol). After I2 was dissolved completely, TEA (1.7 g, 16.4 mmol) was added quickly at rt. The mixture was stirred for 15 mins. Tert-butyl 3-(2-(2-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza bicyclo[3.2.1]octane-2-carbonyl)hydrazinyl)-2-oxoethyl)azetidine-1-carboxylate (2.0 g, 4.1 mmol) was added. The mixture was stirred at rt for 1 h. The reaction mixture was concentrated and the residue was purified by silica gel column chromatography (gradient elution 0˜40% EtOAc/petroleum ether) to afford tert-butyl 3-((5-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octan-2-yl)-1,3,4-oxadiazol-2-yl)methyl)azetidine-1-carboxylate (1.3 g, 66%) as a white solid. ESI-MS (EI+, m/z): 470 [M+H]+.

後処理

  1. stirringThe mixture was stirred at rt for 1 h
  2. concentrationThe reaction mixture was concentrated
  3. customthe residue was purified by silica gel column chromatography (gradient elution 0˜40% EtOAc/petroleum ether)

出典と根拠

ORDレコード
ord-408f724ed43443ce97021e0687f990cd
出典データセット
uspto-grants-2015_01
特許番号
US08940897B2

反応ノート

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