110958-28-6Relevant articles and documents
HETEROANALOGOUS DEAZAPURINES VIA NOVEL 4 + 2 CYCLOADDITION REACTIONS OF KETENIMINES
Kollenz, Gert,Penn, Gerhard,Ott, Walter,Peters, Karl,Peters, Eva-Maria,Schnering, Hans Georg von
, p. 625 - 631 (2007/10/02)
The heterocyclic 2,3-diones 1 and the ketenimines 2 combine yielding heteroanalogous deazapurines 4, 6 and 7 partly having so far unknown molecular skeletons, which were made evident with aid of X-ray structure analyses (6b, 7a), IR- and 13C NMR measurements.The reaction pathways include 4 + 2 cycloaddition processes across the C=N-bond of the ketenimine, accompanied by several surprising rearrangements.These are the first examples observed of 4 + 2 cycloaddition reactions with ketenimines of to oxa-1,3-dienes.