The complete ¹H and ¹³C NMR assignments of four series pyrido[4,3-d]pyrimidine derivatives were achieved by combination of one and two-dimensional NMR experiments, and the NMR signals of these compounds were analyzed and compared. Copyright © 2012 John Wiley & Sons, Ltd.

Complete ¹H and ¹³C NMR assignments and Z/E-stereoconfiguration determination for a series of new isomers of 1,4-diketone derivatives obtained via self-sorting tandem reaction were accomplished by means of one- and two-dimentional NMR experiments including ¹H, ¹³C, gCOSY, gHSQC, gHMBC, and NOESY. Copyright © 2008 John Wiley & Sons, Ltd.