Predict the major product(s) for each of the following reactions. Show both enantiomers if a racemic mixture is formed: ? ? 1) RCO₂H 2) H3O+ HBr 1) BH3⚫ THF 2) H2O2, NaOH ? ? H2, Pt Br2 ?
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- Predict the major product(s) for each of the following reactions. Show both enantiomers if a racemic mixture is formed: ? 1) RCO₂H 2) H₂O+ HBr H₂, Pt • 1) BH3 THF 2) H2O2, NaOH Br2 ? ? ?Show how you would synthesize each compound using methylenecyclohexane asyour starting material. If a chiral product is shown, assume that it is part of a racemicmixture.Complete the following reaction scheme. Give all product(s) and indicate major or minor and any relevant stereochemistry (g) 1) BH3. THF 2) H202, OH (h) 1) Hg(OАC), H,о 2) NABH4
- Draw the products formed when both cis- and trans-but-2-ene are treated with a peroxyacid followed by −OH (in H2O). Explain how these reactions illustrate that anti dihydroxylation is stereospecific.Acid-catalyzed bromination of pentan-2-one (CH3COCH2CH2CH3) forms two products: BrCH2COCH2CH2CH3 (A)and CH3COCH(Br)CH2CH3 (B). Explain why the major product is B, with the Br atom on the more substituted side of the carbonyl group.When 2-bromo-3-phenylbutane is treated with sodium methoxide, two alkenes result (by E2 elimination). The Zaitsevproduct predominates.(a) Draw the reaction, showing the major and minor products.(b) When one pure stereoisomer of 2-bromo-3-phenylbutane reacts, one pure stereoisomer of the major product results.For example, when (2R,3R)-2-bromo-3-phenylbutane reacts, the product is the stereoisomer with the methyl groups cis.Use your models to draw a Newman projection of the transition state to show why this stereospecificity is observed.(c) Use a Newman projection of the transition state to predict the major product of elimination of (2S,3R)-2-bromo-3-phenylbutane.(d) Predict the major product from elimination of (2S,3S)-2-bromo-3-phenylbutane. This prediction can be made withoutdrawing any structures, by considering the results in part (b)
- When 2-bromo-3-phenylbutane is treated with sodium methoxide, two alkenes result (by E2 elimination). The Zaitsevproduct predominates.(a) Draw the reaction, showing the major and minor products.(b) When one pure stereoisomer of 2-bromo-3-phenylbutane reacts, one pure stereoisomer of the major product results.For example, when (2R,3R)-2-bromo-3-phenylbutane reacts, the product is the stereoisomer with the methyl groups cis.Use your models to draw a Newman projection of the transition state to show why this stereospecificity is observedWhen 2-bromo-3-phenylbutane is treated with sodium methoxide, two alkenes result (by E2 elimination). The Zaitsevproduct predominates.(a) Draw the reaction, showing the major and minor products.(b) When one pure stereoisomer of 2-bromo-3-phenylbutane reacts, one pure stereoisomer of the major product results.For example, when (2R,3R)-2-bromo-3-phenylbutane reacts, the product is the stereoisomer with the methyl groups cis.Use your models to draw a Newman projection of the transition state to show why this stereospecificity is observed.(c) Use a Newman projection of the transition state to predict the major product of elimination of (2S,3R)-2-bromo-3-phenylbutaneWhich of the following corresponds to the expected major product of the reaction sequence shown? 1. Na, NH3, -33°C 2. Br2, CH2CI2 Br Br Br NH2 Br Br Br Br Br
- Consider the series of the trans effect: CO, CN-, C2H4 > PR3, H-, CH3- > C6H5- > NO2-, SCN-, I- > Br- >Cl- > py > NH3 > H20 What would be the major product of the following reaction? Select one:Draw a reactant with formula CzH,CI that would give the following product mixture of the reaction shown. NH? H3C NH2 H3C. C7H;CI + NH3 NH2What product(s) is(are) formed in the following reaction Br/CH-Clz Br plus enantiomer H3C Et Br Br H and H3C Br H3C Et Et Br он ...Et plus enantiomer H3C Br