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Inside Cover: Blue LED Irradiation of Iodonium Ylides Gives Diradical Intermediates for Efficient Metal‐free Cyclopropanation with Alkenes (Angew. Chem. Int. Ed. 47/2019)
Author(s) -
Chidley Tristan,
Jameel Islam,
Rizwan Shafa,
Peixoto Philippe A.,
Pouységu Laurent,
Quideau Stéphane,
Hopkins W. Scott,
Murphy Graham K.
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201912827
Subject(s) - cyclopropanation , cyclopropane , diradical , chemistry , photochemistry , carbene , cover (algebra) , metal , organic chemistry , physics , catalysis , mechanical engineering , nuclear physics , singlet state , engineering , excited state , ring (chemistry)
The Generation of doubly activated cyclopropanes upon irradiating alkenes and β‐dicarbonyl‐derived iodonium ylides with visible light from blue LEDs is shown by S. Quideau, W. S. Hopkins, G. K. Murphy, and co‐workers in their Research Article on page 16959 ff. This metal‐free cyclopropane synthesis works with cyclic and acyclic ylides and electronically diverse alkenes. Computational analysis supports a mechanism based on exclusive HOMO to LUMO excitation, instead of free‐carbene generation.