Draw the structure of the alkyl bromide A needed to complete the synthesis of the hydrocarbon shown below. A Check CuLi Click and drag to start drawing a structure. B m ☐ G

How can an ethanol be denatured?

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Explain addition of H2O to an alkyne ?

Question #22 needed

Complete the following reactions? 1). NaBH¾/ethanol ii). H3O* H. i). LIAIH,/ether ii). H3O*

Draw the organic products of the attached reaction.

Draw the starting reactant that would produce this alkene through a Wittig reaction. Ignore inorganic byproducts. Drawing BuLi

Select the bond(s) that is/are formed in the electrophilic addition. H :CI:

5. Ribose's structure is ОН HO ОН ОН a) Draw using the arrow formalism the reaction of linear ribose to make a 5-membered ring. b) What is the name of the resulting functional group? c) Given that reaction of alcohols (such as RCH2OH) with carbonyls (such as HCO-R') to create this functional group is typically not thermodynamically favored, why does most ribose in water exist as a 5-membered ring? A few word answer is fine. d) AG°for this reaction is about - 5 kJ/mol. Assuming that you start with a 1 mM solution of ribose in water, what is the approximate concentration at equilibrium of (i) the linear form? (ii) The cyclic form? (A good answer should be correct within 20%, e.g. it is fine to approximate 9 mM as 10 mM, but it is not okay to approximate 0.1 mM as 1 mM.) e) This reaction creates a new stereocenter. Please indicate it with a *. f) Consider the starting point for synthesis of purines like ATP, which is PRPP (pheseboribosylevOrhesehate) НО НО LOLOH HO ОН HO OH Pyrophosphate…