Oxidation

(3R,4R)-4-Acetoxy-3-[(R)-1-(tert-butyldimethylsilyloxy)ethyl]azetidin-2-one(3R,4R)-4-Acetoxy-3-[(R)-1-(tert-butyldimethylsilyloxy)ethyl]azetidin-2-one
2-Thiophenecarbonyl chloride2-Thiophenecarbonyl chloride
2-Thiophenecarboxylic acid2-Thiophenecarboxylic acid
3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carbonyl chloride3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carbonyl chloride