3-methyl-1-[3-(3-methyl-2-oxobutylidene)-1,4-dihydro-quinoxalin-2-ylidene]butan-2-one.

Ibrahim Bouabdallah; Ismail Zidane; Rachid Touzani; Fouad Malek; Mohamed El Kodadi; Abdelkrim Ramdani

doi:10.3390/M383

,

and

Laboratoire de Chimie Organique Physique, Département de Chimie, Faculté des Sciences, Université Mohamed Premier, BP 524, 60000, Oujda , Maroc.

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Author to whom correspondence should be addressed.

Molbank2004, 2004(1), M383;https://doi.org/10.3390/M383

Version Notes

Order Reprints

To a solution of 3,8-dihydroxy-2,9-dimethyl deca-3,7-diene-5,6-dione 2 [1] (270 mg, 1.2 mmol) in absolute ethanol (20 mL) was added the orthophenylenediamine 1 (129 mg, 1.2 mmol) and the mixture was refluxed for one hour [2]. The yellow precipitate 3 was filtered off, washed with ethanol and dried in air.

Yield: (170 mg , 50 %).

Melting point: 70-71°C (EtOH).

IR (KBr, cm^-1): 2900 (CH of CH₃), 1620 (C=O).

¹H-NMR (200 MHz, CDCl₃, d, ppm): 14.81 (s, 2H, N-H); 7.05 (m, 4H, C-H benz); 5.72 (s, 2H, =CH); 2.69 (m, 2H, C-H, J = 6.9 Hz); 1.19 (d, 12H, CH₃, J = 6.9 Hz).

¹³C-NMR (200 MHz, CDCl₃, d, ppm): 204.50 (C=O); 145.56 (C₃) ; 126.17 (C₆); 124.77 (C_4a ); 116.55 (C₅); 89.01 (=C-H); 40.79 (C-H); 20.07 (CH₃).

HR/MS (C₁₈H₂₂N₂O₂): calc 298.1681; found 298,1700.

Supplementary materials

Supplementary File 1Supplementary File 2Supplementary File 3

References and notes:

Bouabdallah, I.; Zidane, I.; Malek, F.; Touzani, R.; El Kodadi, M.; Ramdani, A. Molbank 2003, M345.
Waring, M.; Ben-hadda, T.; Kotchevar, A.; Ramdani, A.; Touzani, R.; El Kadiri, S.; Hakkou, A.; Bouakka, M.; Ellis, T. Molecules 2002, 7, 641–656. [CrossRef]

Sample Availability : Available from the Authors.

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