Which of the Following Dienes Can Undergo the Diels-alder Reaction?

Answer the following questions and so printing 'Submit' to become your score.

Question one

Which of the following dienophiles is the most reactive with buta-1,3-diene?

a)

b)

c)

d)

Question 2

Which of the following dienes cannot undergo Diels-Alder reactions?

a)

b)

c)

d)

Question 3

Which of adducts (a)-(d) is the main product of the following Diels-Alder reaction?

a)

b)

c)

d)

Question 4

Which of the following is the primary product in the ozonolysis of 1,iv-dimethylcyclohexene followed by a reductive workup with Zn and ethanoic acrid?

a)

b)

c)

d)

Question 5

Which of the post-obit is the main production in the ozonolysis of 1,5-dimethylcyclohexene followed by a workup with aqueous H_iiO_ii?

a)

b)

c)

d)

Question six

Which of phenols (a)-(d) is the chief product of the following thermal rearrangement?

a)

b)

c)

d)

Question 7

Which of unsaturated aldehydes (a)-(d) is the sigmatropic rearrangement production obtained by heating the following ether?

a)

b)

c)

d)

Question 8

Which of the following reactions is not thermally allowed?

a)

b)

c)

d)

d

Question 9

Which of the following reactions is classified as an ene reaction?

a)

b)

c)

d)

Question 10

Which of the following reactions is classified as an electrocyclic reaction?

a)

b)

c)

d)

Question 11

Which of the following dienophiles is the near reactive in normal Diels-Alder reactions?

a)

b)

c)

d)

Question 12

Which of the following dienophiles is the to the lowest degree reactive in normal Diels-Alder reactions?

a)

b)

c)

d)

Question xiii

Which of adducts (a)-(d) is the main kinetic product of the following Diels-Alder reaction?

a)

b)

c)

d)

Question 14

Which of the following is the primary product in the ozonolysis of 1,3-dimethylcyclohexene followed by a workup with Zn and ethanoic acid?

a)

b)

c)

d)

Question 15

Which of the following is impossible as a resonance form of ozone?

a)

b)

c)

d)

Question 16

Which side-chain carbon makes a new bond to the benzene ring upon Claisen rearrangement of the following allylic phenyl ether?

a) C1

b) C2

c) C3

d) C4

Question 17

The post-obit involves ii pericyclic reactions. Which combination indicates correctly the types of reaction involved?

a) [4+2] cycloaddition + [2+2] cycloreversion

b) cheletropic reaction + [4+2] cycloaddition

c) [four+2] cycloaddition + [iv+1] cycloreversion

d) [4+2] cycloaddition + cheletropic reaction

Question 18

Which of compounds (a)-(d) is the likely intermediate of the following transformation involving 2 electrocyclic reactions (ring opening and ring closure)?

a)

b)

c)

d)

Question xix

Which of the following reactions is classified every bit a sigmatropic rearrangement?

a)

b)

c)

d)

Question twenty

Which of the following is classified as an electrocyclic reaction?

a)

b)

c)

d)

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Source: http://global.oup.com/uk/orc/chemistry/okuyama/student/mcqs/ch21/

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