Structure And Stereochemistry Of Pyrazolines, Precursors To Gem-Dimethylcyclopropane

A complete and unambiguous assignment of the H-1 and C-13 NMR spectra of 5,5-dimethyl-4-(p-methoxyphenyl)-3-(naphthalen-2-yl-carbonyl)-Delta(2)-pyrazoline, 2-[4-(p-methoxyphenyl)-5,5-dimethyl-4,5-dihydro-3H-pyrazol-3-yl]-5,5-dimethyl-2-(naphthalen-2-yl)-2,5-dihydro[1,3,4]oxadiazole, 2,5,5,9-tetramethyl-3,4-diazatricyclo[6.3.1.0(2,6)]-dodeca-3,9-diene-7,11-dione and 2,5,5,12,12,9-hexamethyl-3,4,10,11-tetraazatetracyclo[1.3.6.6.0(2,6).0(9,13)] undeca-3,11-diene-7,14-dione was accomplished by inverse two-dimensional chemical shift correlation methods and their conformations were determined by NOESY experiments.