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- 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-phenylbutaneWhen 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 observedWhat is the major product fromed from the reaction below?
- Q2: Give the structure of the possible Claisen condensation product from the following reaction .Tell which , If any you would expect to predominate in each case .(a) CH3CO2Et + CH3CH2CO2Et (b) C6H6CO2Et + C6H5CH2CO2Et(c) EtOCO2Et + Cyclohexanones (d) C6H5CHO + CH3CO2EtDraw the favored product(s) of the following reactions (organic chemistry)When the following stereoisomer of 2-bromo-1,3-dimethylcyclohexane is treated withsodium methoxide, no E2 reaction is observed. Explain why this compound cannotundergo the E2 reaction in the chair conformation.
- For each reaction, decide whether substitution or elimination (or both) is possible, andpredict the products you expect. Label the major products. chlorocyclohexane + NaOC(CH3)3 in (CH3)3COHWhen 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 productsWhich substituent is the strongest deactivator to EAS reactions? -NO2 -Cl -CH3 -OH