First higher-order photocycloaddition to a C=N bond: 1,3-diazepines from maleimides.
A light touch is all that is required to cleave a maleimide C-N bond to effect a [5+2] photocycloaddition with a sterically encumbered C=N moiety (see scheme).
Cubbage
Kara L
KL
School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
Orr-Ewing
Andrew J
AJ
Booker-Milburn
Kevin I
KI