The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition are to be identified. Further how the reactions occur also is to be stated. Concept introduction: In cycloaddition reaction two unsaturated molecules add to one another to yield a cyclic product If even number of electron pair is involved then thermal reaction occur through antarafacial pathway and photochemical reactions occur through suprafacial pathway. If odd number of electron pair is involved then thermal reaction occur through suprafacial pathway and photochemical reactions occur through antarafacial pathway. To identify: The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition and to state how they occur.

Question

Manoharan Mariappan, FR.D., 34) Complete the following reaction starting from hex-1-yne proceeding via different substitution reactions forming 2-heptanone. (25 pts). A Sia₂BH H₂O₂ NaOH Br D Mechanism for reaction D - ether-cleavage: 10 B Ph-MgCI, THF H₁₂O+ D HBr (XS) C TsCl, Py CH3-CH2-CH2-ONa

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Chapter 30.SE, Problem 26AP

Interpretation Introduction

Interpretation:

The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition are to be identified. Further how the reactions occur also is to be stated.

Concept introduction:

In cycloaddition reaction two unsaturated molecules add to one another to yield a cyclic product

If even number of electron pair is involved then thermal reaction occur through antarafacial pathway and photochemical reactions occur through suprafacial pathway.

If odd number of electron pair is involved then thermal reaction occur through suprafacial pathway and photochemical reactions occur through antarafacial pathway.

To identify:

The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition and to state how they occur.

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