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2. (15 points) Examine the given reaction. (a) Multiple alkene products are possible under these conditions....
Problem 2 (15 points, 3 points each). Supply the substrates), reaction condition(s) or the produc...
Problem 2 (15 points, 3 points each). Supply the substrates), reaction condition(s) or the products) needed to complete each of the following transformations. If multiple enantiomers, diastereomers, or regioisomers are formed, they must be indicated for full credit. You do not need to labal major and minor products. In some cases, no reaction may occur. Assume an aqueous workup step for each reaction. H2N AcOH ls b. (This is almost identical to the quiz question!) MgBr 1) TsOH, xcess MeOH...
Challenge CH 235R F 2019 Week 11 Problem #2 1. Predicting Major and Minor elimination products...
Challenge CH 235R F 2019 Week 11 Problem #2 1. Predicting Major and Minor elimination products For each of the following alkenes, draw all possible elimination products for the following molecules, ignoring the mechanism. Indicate the major alkene product. noted II. E2 Eliminations on substituted cyclohexane halides Consider the two isomeric compounds below. a) Draw each in a chair conformation, b) Show the mechanism and final alkene product(s) that form from an E2 reaction with CH,O/CH,OH. c) If more than...
Complete the following with the correct products, label Zaitsev and Hofmann, and explain why the reaction...
Complete the following with the correct products, label Zaitsev and Hofmann, and explain why the reaction is either regioselective or stereoselective. (6 pts.) D -Br Nahi Complete each of the following reactions by adding the starting material, reaction conditions, or all possible product(s) - label major/minor - Sx2. Sx1, E2 or E1. (33 pts.) (CH3),COK DMF C(CH3) NaOH DMSO CH OH heat Ph H+Br NaOCH, H+CHE Ph DMF SK DMF o (only product)
1. (15 points) Draw each of the potential products for each reaction tabel each product as...
1. (15 points) Draw each of the potential products for each reaction tabel each product as major, minor, or insignificant Label what mechanism would generate each product OH 1. Tscl pyridine 2. NaBr, acetone 3 NACN, DMSO 129 Heso, SN2 E2 go facendo KOI-Bu HON-Bu or EON Etон
Name: 1 What is the major product of the following reaction? (CHдЬсo (CHЊ,сон Br IV A) I B) II C) III D) IV 2. What...
Name: 1 What is the major product of the following reaction? (CHдЬсo (CHЊ,сон Br IV A) I B) II C) III D) IV 2. What is the major elimination product obtained from the following reaction? NaOMe MeOH Br IV A) I B) II C) III D) IV 3. Which of the following is the most reactive substrate in an E2 reaction? CHiCH(Br)CH2CHs (CHs)sCBr CH3Br CH3CH2CH2CH2Br п ш IV I B) II С) ш D) IV A) I 4 Which of...
Draw ALL possible unimolecular elimination (E1) products formed under the reaction conditions below; don't worry about...
Draw ALL possible unimolecular elimination (E1) products formed under the reaction conditions below; don't worry about specifving the maior vs, minor products. Where relevant, indicate the stereochemical outcome. 1. OTf E1OH 70 °C
(a) When cis-1-bromo-2-methylcyclohexane undergoes an E2 reaction, two products (cycloalkenes) are formed. What are these two...
(a) When cis-1-bromo-2-methylcyclohexane undergoes an E2 reaction, two products (cycloalkenes) are formed. What are these two cycloalkenes, and which would you expect to be the major product? Write conformational structures showing how each is formed. (b) When trans-1-bromo-2-methylcyclohexane reacts in an E2 reaction, only one cyclo- alkene is formed. What is this product? Write conformational structures showing why it is the only product.
I don't know how to distinguish E1 and E2 reacions. For E2 reactions I have trouble...
I don't know how to distinguish E1 and E2 reacions.
For E2 reactions I have trouble with the transition state. These
reactions need intermediate steps and transition states but not
products.
1. (i) (2.5 points x 10-25 points) For the following elimination reactions Write bond-line structure of the substrate and the reagent Write full mechanism for the reaction transition state for E2, intermediate for El) and name the reaction either as El or E2; Write all possible products of the...
5. (4 points) Aniline and ethyl acetoacetate react under similar conditions as Pechmann condensation. This reaction...
5. (4 points) Aniline and ethyl acetoacetate react under similar conditions as Pechmann condensation. This reaction produces two possible products. Their IR spectra show peaks at 3300 cm1, but no peaks at 1700 cm1 NH2 н* ? ? heat aniline Draw the structures of the two possible products.
Assume that the compound depicted above was formed under acidic conditions, was the major product obtained...
Assume that the compound depicted above was formed under acidic conditions, was the major product obtained after purification (> 70%), and was isolated as a mixture of diastereomers. Is it possible to know with absolute certainty that the immediate precursor featured the 6-membered ring that is seen in the product? Indicate your answer by circling the appropriate word below. YES NO Explain your reasoning. Your answer should contain sufficient detail to persuade a scholar of organic chemistry. The best answers...
Problem 2 (15 points, 3 points each). Supply the substrates), reaction condition(s) or the products) needed to complete each of the following transformations. If multiple enantiomers, diastereomers, or regioisomers are formed, they must be indicated for full credit. You do not need to labal major and minor products. In some cases, no reaction may occur. Assume an aqueous workup step for each reaction. H2N AcOH ls b. (This is almost identical to the quiz question!) MgBr 1) TsOH, xcess MeOH...
Challenge CH 235R F 2019 Week 11 Problem #2 1. Predicting Major and Minor elimination products For each of the following alkenes, draw all possible elimination products for the following molecules, ignoring the mechanism. Indicate the major alkene product. noted II. E2 Eliminations on substituted cyclohexane halides Consider the two isomeric compounds below. a) Draw each in a chair conformation, b) Show the mechanism and final alkene product(s) that form from an E2 reaction with CH,O/CH,OH. c) If more than...
Complete the following with the correct products, label Zaitsev and Hofmann, and explain why the reaction is either regioselective or stereoselective. (6 pts.) D -Br Nahi Complete each of the following reactions by adding the starting material, reaction conditions, or all possible product(s) - label major/minor - Sx2. Sx1, E2 or E1. (33 pts.) (CH3),COK DMF C(CH3) NaOH DMSO CH OH heat Ph H+Br NaOCH, H+CHE Ph DMF SK DMF o (only product)
1. (15 points) Draw each of the potential products for each reaction tabel each product as major, minor, or insignificant Label what mechanism would generate each product OH 1. Tscl pyridine 2. NaBr, acetone 3 NACN, DMSO 129 Heso, SN2 E2 go facendo KOI-Bu HON-Bu or EON Etон
Name: 1 What is the major product of the following reaction? (CHдЬсo (CHЊ,сон Br IV A) I B) II C) III D) IV 2. What is the major elimination product obtained from the following reaction? NaOMe MeOH Br IV A) I B) II C) III D) IV 3. Which of the following is the most reactive substrate in an E2 reaction? CHiCH(Br)CH2CHs (CHs)sCBr CH3Br CH3CH2CH2CH2Br п ш IV I B) II С) ш D) IV A) I 4 Which of...
Draw ALL possible unimolecular elimination (E1) products formed under the reaction conditions below; don't worry about specifving the maior vs, minor products. Where relevant, indicate the stereochemical outcome. 1. OTf E1OH 70 °C
(a) When cis-1-bromo-2-methylcyclohexane undergoes an E2 reaction, two products (cycloalkenes) are formed. What are these two cycloalkenes, and which would you expect to be the major product? Write conformational structures showing how each is formed. (b) When trans-1-bromo-2-methylcyclohexane reacts in an E2 reaction, only one cyclo- alkene is formed. What is this product? Write conformational structures showing why it is the only product.
I don't know how to distinguish E1 and E2 reacions.
For E2 reactions I have trouble with the transition state. These
reactions need intermediate steps and transition states but not
products.
1. (i) (2.5 points x 10-25 points) For the following elimination reactions Write bond-line structure of the substrate and the reagent Write full mechanism for the reaction transition state for E2, intermediate for El) and name the reaction either as El or E2; Write all possible products of the...
5. (4 points) Aniline and ethyl acetoacetate react under similar conditions as Pechmann condensation. This reaction produces two possible products. Their IR spectra show peaks at 3300 cm1, but no peaks at 1700 cm1 NH2 н* ? ? heat aniline Draw the structures of the two possible products.
Assume that the compound depicted above was formed under acidic conditions, was the major product obtained after purification (> 70%), and was isolated as a mixture of diastereomers. Is it possible to know with absolute certainty that the immediate precursor featured the 6-membered ring that is seen in the product? Indicate your answer by circling the appropriate word below. YES NO Explain your reasoning. Your answer should contain sufficient detail to persuade a scholar of organic chemistry. The best answers...
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