213273-03-1Relevant articles and documents
Investigations on peri-, regio- and stereoselectivities in thermal cycloadditions involving C-(4-oxo-4H[1]benzopyran-3-yl)-N-phenylnitrones: Role of steric factors and secondary interactions in 1,3-dipolar cycloadditions
Ishar,Singh, Gurmit,Kumar, Kamal,Singh, Rajinder
, p. 7817 - 7828 (2000)
Complete peri-, regio- and stereoselectivities in thermal reactions of C-(4-oxo-4H[1]benzopyran-3-yl)-N-phenylnitrones with both electron-rich and electron-deficient olefins have been investigated. This conjugated nitrone undergoes frontier-orbital (LUMO-
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.
Regio- and stereoselective synthesis of 1-benzopyrano[2,3-b]pyrrolo[2,3-d] pyridines: A microwave-accelerated intramolecular [3+2] cycloaddition reaction of azomethine ylide
Maiti, Sourav,Lakshmykanth,Panja, Suman Kalyan,Mukhopadhyay, Ranjan,Datta, Ayan,Bandyopadhyay, Chandrakanta
scheme or table, p. 763 - 768 (2011/09/16)
Figure represented. Regio- and stereoselective syntheses of tetracyclic compounds having chromone, pyrrolidine, and piperidine rings have been accomplished by an intramolecular [3+2] cycloaddition reaction involving azomethine ylide. The reactions were ca