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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- 2. a. b. d. C. oFor each reaction, draw the product(s) and circle the mechanism(s). Include "major be and “minor" when necessary. Stereochemistry must be included for stereoselective reaction "No reaction" is a possible answer. Br Br ts Br CI ta ха но Br CH3ONa CH₂OH KSH acetone Br₂ hv CH3OH NaCN DMSO ser nongaholds zid) no baard E2 E1 SN1 SN2 X. E2 E1 SN1 SN2 X. E2 E1 SN1 SN2 X. E2 E1 SN1 SN2 X• E2 E1 SN1 SN2 X• E2 E1 SN1 SN2 X.1. Predict the major product for each. Consider regio and stereochemistry. 1. CPBA 1. MCPBA 2. H*, H20 2. H*, H20 1. Os04 1. ÖSŐ4 2. NaHSO3, H20 2. NaHSO3, H20 1. MCPBA 1. OsO, 2. H*, H20 2. NaHSO3, H20 1. mCРBA 1. OsO4 2. H', Н-О 2. NaHSO3. H20Q1: Determine the major product(s) of the following reaction with correct stereochemistry where applicable. H2SO4 (cat.) H) XH OH heat Br 1) MeOH SN1 Q2. Ranke the following in the order of increasing reactivity towards SN1 reaction. CH3 CH3 CH3 H2C CH2 CH3 CH3 H₂C CH2 CH3 CH3 H2C CH2 H3C Br H3C Br H3C CI Br I ။ III IV Least reactive Most reactive
- Draw the major organic product generated in the reaction below. Pay particular attention to regio- and stereochemical detail.c and d help thank you2. Predict the major product for each of the following reactions, all of which use the same starting material. Show stereochemistry where relevant. 1. BH3 THF 2. NaOH, H2O2 1. Hg(OAc)2, H20 2. NaBH4 H2 Pd/C H2SO, theh H20 purty houhron oirtel
- Select the proper sequence of reactions to yield the transformation shown. Three Steps Stereochemistry is tras 1. LI/NH3 2. NaNH2, (C6H5)CH2Br 3. CH212, Zn(Cu) 1. Na/NH3, (C6H5)CH2Br 2. NANH2 3. CH212, Zn(Cu) 1. LI/NH3, (C6H5)CH2Br 2. NANH2 3. CH212, Zn(Cu) 1. NaNH2, (C6H5)CH2Br 2. LI/NH3 3. CH212, Zn(Cu)What sequence of reagents would best achieve the transformation shown belon? Hr O 1) Br, FeBr 2) Fe, HCl 3) HNO, H SO, 1) Br,, FeBr, 2) HNO, H. SO,3) Fe, HCI 1) HNO,, H So, 2) Fe, HC1 3) Br,, FeBr, 1) HNO, H SO, 2) Br,, FeBr, 3) Fe, HCIhelp
- 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);CDraw the products for the following reactions. Make sure to include stereochemistry when applicable. a) b) c) f) g) CH3O. Br NaF 15-crown-5 Benzene HBr 1. CH3SNa 2. H₂O 1) Hg(OAc)2, 2) NaBH4 1) Br₂/H₂O 2) NaOH H CH₂OCH3 O₂N H OH Heat HeatParts 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.