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- The following molecule was formed by a Robinson annulation reaction. What reactants were used?The key step in a reported laboratory synthesis of sativene, a hydrocarbon isolated from the mold Helminthosporium sativum, involves the following base treatment of a keto tosylate. What kind of reaction is occurring? How would you complete the synthesis?What carbonyl compound and CBS reagent are needed to prepare X, an intermediate in the synthesis of ezetimibe (trade name Zetia), a drug that lowers cholesterol levels by inhibiting its absorption in the intestines?
- Draw the product formed when phenylacetic acid (C6H5CH2COOH) istreated with following reagent. With some reagents, no reaction occurs. NH3 (1 equiv)Draw the product formed when phenylacetic acid (C6H5CH2COOH) istreated with following reagent. With some reagents, no reaction occurs. NH3 , Δwhat pair of reagants can prepare diarylakene shown
- When a 2, 6-disubstituted allyl phenyl ether is heated in an attempted Claisen rearrangement, migration occurs to give the p-allyl product as the result of two sequential pericyclic reactions. Explain.Draw the product formed when the α,β-unsaturated ketone A is treated with each reagent.a. NaBH4, CH3OH b. H2 (1 equiv), Pd-C c. H2 (excess), Pd-C d. [1] CH3Li; [2] H2O e. [1] CH3CH2MgBr; [2] H2O f. [1] (CH2=CH)2CuLi; [2] H2Odedcue the major organic product from the following reations. be ablw to draw hydration halogenation hydrohalogenation, halohydrin formation, oxymercuratiom demercuration qnd hydroboration oxidation.
- What acetylide anion and epoxide are needed to synthesize C?What acetylide anion and epoxide are needed to synthesize each compound?Oxidation of cholesterol converts the alcohol to a ketone. Under acidic or basic oxidationconditions, the C“C double bond migrates to the more stable, conjugated position. BeforeIR and NMR spectroscopy, chemists watched the UV spectrum of the reaction mixture tofollow the oxidation. Describe how the UV spectrum of the conjugated product, cholest-4-en-3-one, differs from that of cholesterol