If pentane-1,3-diol reacts with in the presence of pyridine it gives product A. And if A reacts with in the presence of pyridine it gives a product B. Indicate which products A and B are.
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- The compound eutypine is an antibacterial agent isolated from the fungus Eutypa lata. This fungus results in a disease common to vineyards called eutyposis. Give a sequence of reactions that will take the following reactant and give eutypine when the other reactants used in the sequence are acetylene and acetone.Draw structural formulas for (1) the alkyltriphenylphosphonium salt formed by treatment of each haloalkane with triphenylphosphine, (2) the phosphonium ylide formed by treatment of each phosphonium salt with butyllithium, and (3) the alkene formed by treatment of each phosphonium ylide with acetone.Provide the reagents necessary to complete the following reactions. More than one step may be necessary, if so number separate steps.
- The (R)-isomer of a-terpineol is a component of perfumes and flavorings and has a lilac-like floral odor. The (S)-isomer has a pine-like odor. Propose two methods of producing a-terpineol using Grignard reactions. [Ignore stereochemistry in your synthesises.]Write the mechanisms for the following reactions bellow, justifying each substitution position.Provide an explanation (in detail) on how base catalysts speed up nucleophilic reactions of carbonyl compounds.
- GIVE THE COMPLETE PRODUCT OF THE FOLLOWING REAGENTS.Suppose you want to determine the inductive effects of a series of functional groups (e.g., Cl, Br, CN, COOH, and C6H5). Is it best to use a series of ortho-, meta-, or parasubstituted phenols? Explain.Give the major product of this reaction sequence. 1) (CH3)2CuLi 2) weak acid (aq NH4CI) BA
- Butanone undergoes a nucleophilic addition with a Grignard reagent made from 1-bromopropane and magnesium metal in THF solution. The alkoxide formed from the nucleophilic addition is then conveted into the final product by the careful addition of dilute acid. Complete the mechanism by following the instructions provided for each step. Step 1. Nucleophilic Addition in THFComplete the following reactions by providing missing reagents or products: i.Explain why the treatment of anisole with HBr yields phenol and CH3Br, but not bromobenzene.