p. 1081 - 1084
(2000)(2013/05/08)
(2010/11/29)
p. 5438 - 5446
(2007/10/03)trifluoromethylsulfonic anhydride
(4R,5R,6S)-4-methyl-3,7-dioxo-6-((1'R)-triethylsilanyloxy-ethyl)-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid 4-nitro-benzyl-ester
(R)-2-Diazo-3-oxo-4-[(2R,3S)-4-oxo-3-((R)-1-triethylsilanyloxy-ethyl)-azetidin-2-yl]-pentanoic acid 4-nitro-benzyl ester
4-nitrobenzyl (4R,5R,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-3,7-dioxo-1-azabicyclo[3.2.0]-heptane-2-carboxylate
triethylsilyl chloride
(4S,5R,6S)-4-Methyl-7-oxo-3-(9-oxo-7-trimethylsilanyloxymethyl-9H-fluoren-3-yl)-6-((R)-1-triethylsilanyloxy-ethyl)-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester
(4S,5R,6S)-3-(4-acetyl-phenyl)-4-methyl-7-oxo-6-((1'R)-triethylsilanyloxy-ethyl)-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl-ester
(4S,5R,6S)-3-(4-acetyl-phenyl)-6-((1′R)-acetoxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl-ester
potassium (4S,5R,6S)-3-(4-acetyl-phenyl)-6-((1′R)-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylate
(4S,5R,6S)-3-(4'-acetyl-biphenyl-4-yl)-6-((1'R)-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl-ester