The structures of the given compounds are to be drawn. Concept introduction: Structure of any organic compound is drawn by following the sets of rules devised by IUPAC. Any structure denotes a particular compound. The root word determines the number of carbons while counting the longest carbon chain. Double of triple bond should be given lowest carbon number. If more than one substituent are present, prefixes like di, tri, tetra, etc. are used.

Question

20.33 Think-Pair-Share (a) Rank the following dienes and dienophiles in order of increasing reactivity in the Diels-Alder reaction. (i) CO₂Et (ii) COEt || CO₂Et MeO MeO (b) Draw the product that results from the most reactive diene and most reactive dienophile shown in part (a). (c) Draw a depiction of the orbital overlap involved in the pericyclic reaction that oc- curs between the diene and dienophile in part (b). (d) Is the major product formed in part (b) the endo or exo configuration? Explain your reasoning.

Answer 1

Question

Chapter 21, Problem 28E

(a)

Interpretation Introduction

Interpretation: The structures of the given compounds are to be drawn.

Concept introduction: Structure of any organic compound is drawn by following the sets of rules devised by IUPAC. Any structure denotes a particular compound. The root word determines the number of carbons while counting the longest carbon chain. Double of triple bond should be given lowest carbon number. If more than one substituent are present, prefixes like di, tri, tetra, etc. are used.

(b)

Interpretation Introduction

Interpretation: The structures of the given compounds are to be drawn.

Concept introduction: Structure of any organic compound is drawn by following the sets of rules devised by IUPAC. Any structure denotes a particular compound. The root word determines the number of carbons while counting the longest carbon chain. Double of triple bond should be given lowest carbon number. If more than one substituent are present, prefixes like di, tri, tetra, etc. are used.

(c)

Interpretation Introduction

Interpretation: The structures of the given compounds are to be drawn.

Concept introduction: Structure of any organic compound is drawn by following the sets of rules devised by IUPAC. Any structure denotes a particular compound. The root word determines the number of carbons while counting the longest carbon chain. Double of triple bond should be given lowest carbon number. If more than one substituent are present, prefixes like di, tri, tetra, etc. are used.

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20.33 Think-Pair-Share (a) Rank the following dienes and dienophiles in order of increasing reactivity in the Diels-Alder reaction. (i) CO₂Et (ii) COEt || CO₂Et MeO MeO (b) Draw the product that results from the most reactive diene and most reactive dienophile shown in part (a). (c) Draw a depiction of the orbital overlap involved in the pericyclic reaction that oc- curs between the diene and dienophile in part (b). (d) Is the major product formed in part (b) the endo or exo configuration? Explain your reasoning.

20.40 The following compound undergoes an intramolecular Diels-Alder reaction to give a tricyclic product. Propose a structural formula for the product. CN heat An intramolecular Diels-Alder adduct

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