methyl 7-bromohept-5-enoate

Phenylacetyl-triphenylsilan

(1S,4R)-cis-4-(tert-Butyldimethylsiloxy)-1-(dimethylamino)-2-(phenylsulfonyl)-2-cyclopentene

methyl 7-iodohept-5-enoate

(1E,3S)-3-t-butyldimethylsilyloxy-1-lithio-octane