“…Furthermore, the reaction of lawsone 1 with α,β-unsaturated ketones like; chalcone, 3-(4-methoxyphenyl)-1-phenylprop-2-en-1-one, 1,5-diphenylpenta-1,4-dien-3-one, 2-benzylidenequinuclidin-3-one, 4-(4-methoxy benzylidene)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, 3-benzylideneindolin-2-one, or 2,5-di(benzylidene)cyclopentan-1-one in DMF yielded α-Lapachone drivatives 3-5, 8-10, and 11, respectively. The structures of 4, 5, 8, and 11 were supported by their 13 C NMR spectral data. Their 13 C NMR showed signals for C-4 at 51.02, 40.35, 40.34, and 40.35 ppm, respectively.…”