1369903-38-7Relevant academic research and scientific papers
Exploring α-chromonyl nitrones as 1,5-dipoles
Wittstein, Kathrin,García, Ana B.,Schürmann, Markus,Kumar, Kamal
supporting information; experimental part, p. 227 - 232 (2012/03/10)
N-Phenyl-C-chromonyl nitrones 1 and the allenoate zwitterion 2, generated by addition of phosphine to acetylenedicarboxylates, undergo a cascade reaction sequence involving an unprecedented [5+3] annulation followed by deoxygenative rearrangement leading to dihydropyridine-fused benzopyrones. Unusual electronic control by the N-substituents of 1 directs the annulation pathway, leading to two different ring-systems. Georg Thieme Verlag Stuttgart - New York.
