O- benzamides

Also analyzed acetaminophen, bucetin (3-hydroxy-p-butyrophenetidine), caffeine, dipy-rone (sulpyrin), ethenzamide (o-etho o benzamide), mefenamic add, phenacetin, sali< -lamide, saliQrlic acid, theobromine, theophylline... 

Stereomutation (Mb2, Mbs and a new one Mb4), and (3) description of olefination as a single step reaction. Spiro-oxaphosphetanes (39-43), stabilized by the presence of the o-benzamide moiety were prepared according to the known procedures (Scheme 14). 

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