37. Pseudo-pericyclic reactions are reactions that appear at first glance to be pericyclic, in that arrow pushing shows a cyclic array of electrons at the transition state. Several of the other facets of pericyclic reactions are also commonly evident, such as low barriers if the geometries are favorable. However, these reactions are never forbidden based upon a symmetry argument. Examples of such reactions are given below. Write the proper arrow pushing for these reactions, and identity the one facet of these reactions that does not properly conform to standard pericyclic reactions, thereby making them "pseudo-pericyclic". (Hint: In your arrow pushing, it is important to identify the correct source of each arrow.) OH [3,5] her [3.3] ING OH

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37. Pseudo-pericyclic reactions are reactions that appear at first glance to be pericyclic, in that arrow pushing shows a cyclic
array of electrons at the transition state. Several of the other facets of pericyclic reactions are also commonly evident, such
as low barriers if the geometries are favorable. However, these reactions are never forbidden based upon a symmetry
argument. Examples of such reactions are given below. Write the proper arrow pushing for these reactions, and identity
the one facet of these reactions that does not properly conform to standard pericyclic reactions, thereby making them
"pseudo-pericyclic". (Hint: In your arrow pushing, it is important to identify the correct source of each arrow.)
OH
[3,5]
ryze Sy
[3.3]
ING
OH
Transcribed Image Text:37. Pseudo-pericyclic reactions are reactions that appear at first glance to be pericyclic, in that arrow pushing shows a cyclic array of electrons at the transition state. Several of the other facets of pericyclic reactions are also commonly evident, such as low barriers if the geometries are favorable. However, these reactions are never forbidden based upon a symmetry argument. Examples of such reactions are given below. Write the proper arrow pushing for these reactions, and identity the one facet of these reactions that does not properly conform to standard pericyclic reactions, thereby making them "pseudo-pericyclic". (Hint: In your arrow pushing, it is important to identify the correct source of each arrow.) OH [3,5] ryze Sy [3.3] ING OH
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