Water → diphenylmethyl (6R,7R)-3-[(methylsulfonyl)oxy]-8-oxo-7-[(phenylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

HRID 28404Notes

Reaction equation

[C:1]1([CH2:7][C:8]([NH:10][C@@H:11]2[C:35](=[O:36])[N:13]3[C:14]([C:19]([O:21][CH:22]([C:29]4[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=4)[C:23]4[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=4)=[O:20])=[C:15]([OH:18])[CH2:16][S:17][C@H:12]23)=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH3:37][S:38](Cl)(=[O:40])=[O:39].C(N(C(C)C)C(C)C)C.O>CC(C)=O>[C:1]1([CH2:7][C:8]([NH:10][C@@H:11]2[C:35](=[O:36])[N:13]3[C:14]([C:19]([O:21][CH:22]([C:23]4[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=4)[C:29]4[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=4)=[O:20])=[C:15]([O:18][S:38]([CH3:37])(=[O:40])=[O:39])[CH2:16][S:17][C@H:12]23)=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

Conditions

Temperature: -20 °C

Procedure

Benzhydryl 7β-[(phenylacetyl)amino]-3-hydroxy-3-cephem-4-carboxylate (500 g, 1 mol) was dissolved in acetone (2 L) and methanesulfonyl chloride (86 mL, 1.1 mol) was added dropwise over 10 min with stirring at −20° C. Then, ethyldiisopropylamine (183 mL, 1.05 mol) was added dropwise over 30 min and the mixture was stirred at −20° C. for 40 min. The reaction mixture was poured into iced water (8 L) and the precipitate was collected by filtration. The precipitate was then washed with water (2 L) and ethyl acetate (300 mL), and dried under reduced pressure to give the title compound (523 g, 0.90 mol). yield: 90%.

Workup

stirringthe mixture was stirred at −20° C. for 40 min
filtrationthe precipitate was collected by filtration
washThe precipitate was then washed with water (2 L) and ethyl acetate (300 mL)
customdried under reduced pressure

Sources & evidence

ORD record: ord-83ad514004584cea9af9411667cdca7c
Source dataset: uspto-grants-2008_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07419973B2

Reaction notes

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