2. Circle the best starting material for each reaction below. Criteria for best can include: fewest number of reactions, best regioselectivity, correct stereochemistry, etc. 3 points HO Br OH Br Br Br OH OH (rac) (rac) (rac)
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- 5. Using curved arrows please give the mechanism of this reaction, including any regioselectivity or stereoselectivity. P. HBr } DCM Br[Review Topics] [References] Draw the major organic product of the reaction shown below. OH H2SO4 • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. 0 A 8 / Q Sn [F ?help
- The cis isomer of 1-bromo-4-tert-butylcyclohexane undergoes E2 elimination about 1,000 times faster than the trans isomer. Explain why the cis isomer reacts faster. Hint: It is not because of steric hindrance. Br + NaOH Fast (H3C),C (H3C);C Br + NaOH Slow (H3C);C' (H3C);Cplease Draw the final major products for each reaction in the designated box. Indicate stereochemistry when applicable. please add also minor productsDraw the missing produts for the reaction shown below. Be sure to include stereochemistry where appropriate.
- The reaction shown can give two different mono-alkylation products depending on the conditions. Draw the kinetic and thermodynamic products of the reaction. 1. base Kinetic + Thermodynamic Products 2. CH3CH₂Br (1 equiv.) Draw the kinetic product. Draw the thermodynamic product. Select Draw Rings More Erase Select Draw Rings More Erase / ||| ||| C H O / || III C H OParts a-c contains a synthetic trap that prevents the given rxn from occurring. Draw the product that is actually produced then give an explanation as to why the given reaction will not work.5. For the following reaction, rationalize why the product is favored, assign stereochemistry at the carbon labelled (*), and explain this stereochemical outcome. Me !!!!H D Me * I D
- 3. Predict the substitution products of the following reaction and pay attention to stereochemistry. Draw the mechanism for this SN1 substitution reaction. Draw all pertinent molecular orbitals (i.e., bonding, anti-bonding, non-bonding) involved in this mechanism. OH EtOH HCI (cat)Draw the major organic product of the reaction. Be sure to draw both the wedge and hash bonds per stereocenter to fully convey the stereochemistry. Select Draw Rings More Erase H N NH 1. Br КОН 2. HCI, H2O, heat 3. NaOHDraw all products of the reaction of (1S,2R)-1-bromo-1,2-dimethylcyclohexane in 80%H2O/20%CH3CH2OHat room temperature..