Reactive-State Spin-Dependent Diastereoselective Photoisomerization of trans,trans-2,3-Diphenylcyclopropane-1- carboxylic Acid Derivatives Included in Zeolites
The asymmetric induction facilitated by a chiral auxiliary during the photoisomerization of trans,trans-2,3-diphenylcyclopropane derivatives depends on the medium (solution vs zeolite) and the reactive state (singlet vs triplet). Within zeolites, direct excitation most likely proceeds via a zwitteri...
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Veröffentlicht in: | Organic letters 2002-11, Vol.4 (24), p.4221-4224 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | The asymmetric induction facilitated by a chiral auxiliary during the photoisomerization of trans,trans-2,3-diphenylcyclopropane derivatives depends on the medium (solution vs zeolite) and the reactive state (singlet vs triplet). Within zeolites, direct excitation most likely proceeds via a zwitterionic intermediate, while triplet sensitization most likely proceeds via a diradical intermediate. |
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ISSN: | 1523-7060 1523-7052 |
DOI: | 10.1021/ol026695l |