(3S,4S)-1-[1-(allyloxycarbonyl)-1-(triphenylphosphoranediyl)methyl]-3-[(1R)-1-(tert-butyldimethylsilyloxy)ethyl]-4-[(1R)-1-{(methylthio)thiocarbonyl}ethyl]-2-oxoazetidine → 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
반응식
[CH2:1]([O:4][C:5]([C:7]([N:27]1[C@H:30]([C@H:31]([C:33]([S:35][CH3:36])=S)[CH3:32])[C@@H:29]([C@H:37]([O:39][Si:40]([C:43]([CH3:46])([CH3:45])[CH3:44])([CH3:42])[CH3:41])[CH3:38])[C:28]1=[O:47])=P(C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)=[O:6])[CH:2]=[CH2:3]>C1(C)C=CC=CC=1>[Si:40]([O:39][C@@H:37]([C@H:29]1[C:28](=[O:47])[N:27]2[C@@H:30]1[C@@H:31]([CH3:32])[C:33]([S:35][CH3:36])=[C:7]2[C:5]([O:4][CH2:1][CH:2]=[CH2:3])=[O:6])[CH3:38])([C:43]([CH3:45])([CH3:44])[CH3:46])([CH3:41])[CH3:42]참가 물질
3
반응물 1
생성물 1
시약·촉매·용매 1
실험 절차
A solution of (3S,4S)-1-[1-(allyloxycarbonyl)-1-(triphenylphosphoranediyl)methyl]-3-[(1R)-1-(tert-butyldimethylsilyloxy)ethyl]-4-[(1R)-1-{(methylthio)thiocarbonyl}ethyl]-2-oxoazetidine (325 mg) in toluene (3 ml) was heated under reflux for 4.5 hours. The solvent was removed under reduced pressure and the residue was purified by silica gel column chromatography [ethyl acetate-hexane (1:3, V/V)] to afford 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 (164 mg).