1H and 13C NMR assignments for new heterocyclic TAM leuco dyes, (2Z,2'E)-2,2'-(2-phenyl propane-1,3-diylidene) bis(1,3,3-trimethylindoline) derivatives. Part II.
The (1)H and (13)C NMR spectra of the novel heterocyclic Leuco-TAM dyes, (2Z, 2'E)-2,2'-(2-phenyl propane-1,3-diylidene) bis(1,3,3-trimethylindoline) derivatives 1-4 as precursors of triarylmethane (TAM)(+) (Malachite Green FB-analog) dyes were completely assigned by 1D and 2D NMR experiments, including DEPT, COSY, HSQC, HMBC, and NOESY. Especially, the diastereotopic gem-dimethyl protons at the C3 and C3' positions of the FB rings were definitively assigned. The (Z,E) isomers adopt the energetically favored three-bladed propeller conformation in solution.
Keum
Sam-Rok
SR
Department of Advanced Materials Chemistry, Korea University, Jochiwon 339-700, South Korea. keum@korea.ac.kr
Roh
Se-Jung
SJ
Lee
Min-Hyung
MH
Sauriol
Francoise
F
Buncel
Erwin
E
D002247:Carbon Isotopes; D004396:Coloring Agents / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods* / Q000592:standards*; D008968:Molecular Conformation; D011522:Protons; D012015:Reference Standards; D012394:Rosaniline Dyes / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D013237:Stereoisomerism
D002247:Carbon Isotopes; D004396:Coloring Agents; D006571:Heterocyclic Compounds; D007211:Indoles; D011522:Protons; D012394:Rosaniline Dyes; D012996:Solutions