p. 2287 - 2308
(2007/10/03)(S)-6-{(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-cyclohex-1-enecarboxylic acid ethyl ester
(3S,4R)-3-<(1R)-1-tert-butyldimethylsilyloxyethyl>-4-<(1S)-2-hydroxymethylcyclohex-2-enyl>-2-azetidinone
6-bromocyclohex-1-enecarboxylic acid ethyl ester
6-hydroxy-cyclohex-1-enecarboxylic acid ethyl ester
(3S,4R)-3-<(1R)-1-tert-butyldimethylsilyloxyethyl>-4-<(1S)-2-phenylselenenylmethylcyclohex-2-enyl>-2-azetidinone
benzhydryl (4S,8S,9R,10S)-4-hydroxy-10-<(1R)-1-hydroxyethyl>-11-oxo-1-azatricyclo-<7.2.0.03,8>undec-2-ene-2-carboxylate
(3S,4R)-3-<(1R)-1-tert-butyldimethylsilyloxyethyl>-4-<(1R,3S)-3-triethylsilyloxy-2-oxocyclohexyl>-2-azetidinone
(3S,4R)-3-<(1R)-1-tert-butyldimethylsilyloxyethyl>-4-<(1R,3S)-3-triethylsilyloxy-2-oxocyclohexyl>-1-(2-diphenylmethoxycarbonyl-1-hydroxyethyl)-2-azetidinone
[(2R,3S)-3-((R)-1-Hydroxy-ethyl)-2-((1R,3S)-3-hydroxy-2-oxo-cyclohexyl)-4-oxo-azetidin-1-yl]-(triphenyl-λ5-phosphanylidene)-acetic acid benzhydryl ester
(3S,4R)-3-<(1R)-1-tert-butyldimethylsilyloxyethyl>-4-<(1R,3S)-3-triethylsilyloxy-2-oxocyclohexyl>-1-(diphenylmethoxycarbonyl-triphenylphosphoranylidenemethyl)-2-azetidinone