Mouhoussine Nacro

7-O-methylapigeninidin, an anthocyanidin from Sorghum caudatum

A new anthocyanidin was isolated from the grains of Sorghum caudatum and identified as 7-O-methylapigeninidin on the basis of spectral data. This pigment was found in low concentration both in grains and in leaf sheaths.

Acylated anthocyanins from the flowers of Ipomoea asarifolia

Abstract Among several anthocyanins detected in the flowers of Ipomoea asarifolia, two acylated anthocyanins were isolated and studied using chemical, GC, mass spectrometric and extensive NMR methods (TOCSY-1D, DQF-COSY and HMBC measurements). The first anthccyanin was identified as cyanidin 3-O-[2-O-(6-O-(E- caffeoyl )-β- d -glucopyranosyl )-6-O-(E- caffeoyl )-β- d -glucopyranoside ]-5-O-[β- d - glucopyranoside ] , and the new structure as cyanidin 3-O-[2-O-(6-O-(E-p- coumaroyl )-β- d -glucopyranosyl) -6-O-(E- caffeoyl )-β- d -glucopyranoside ]-5-O-[β- d - glucopyranoside .

Total Assignment of 1H and 13C NMR Chemical Shifts of a Natural Anthocyanidin, Apigeninidin, Using Two-Dimensional COLOC and HMBC Techniques

The 1H and 13C NMR spectra of apigeninidin chloride were assigned utilizing the two‐dimensional δC, δH correlation and COLOC and HBMC techniques. The full 13C NMR data are reported for the first time. A good correlation was found between 13C chemical shifts and carbon charge obtained by AM1 calculation.

Apodophyllone and isotorquatone, two arenic ketones from Eucalyptus apodophylla

Abstract The essential oil of Eucalyptus apodophylla exploited in Burkina Faso consists mainly in monoterpenes (53.7–66.9%) and sesquiterpenes (9.0–10.0%). It is characterized by important amounts (15.2–32.9%) of arenic ketones belonging to the series of torquatone and of jensenone. Among them, two new structures, apodophyllone and isotorquatone, were clearly identified by 1 H and 13 C NMR.

Phenolic compounds in Sorghum caudatum tissues during plant development

Abstract Sorghum caudatum was found to be particularly rich in anthocyanidins and tannins. Quantification of apigeninidin, the main anthocyanidin present, and tannins was made in different tissues at various developmental stages. Roots, stalks and grains were found to be poor in phenolic compounds while sheaths and leaves were rich. In grains, anthocyanidins and tannins did not exceed 1.6% dry weight. In the sheaths, anthocyanidins and tannins reached 10.8% and 20.7% respectively twenty days after physiological maturation.