Arômes transcontinentaux

Simultaneous determination of four 5-hydroxy polymethoxyflavones by reversed-phase high performance liquid chromatography with electrochemical detection

Accumulating evidence has suggested the potential health-promoting effects of 5-hydroxy polymethoxyflavones (5-OH-PMFs) naturally existing in citrus genus. However, research efforts are hampered by the lack of reliable and sensitive methods for their determination in plant materials and biological samples. Using reversed-phase high performance liquid chromatography (HPLC) equipped with electrochemical (EC) detection, we have developed a fast and highly sensitive method for quantification of four 5-OH-PMFs, namely 5-hydroxy-6,7,8,3',4'-pentamethoxyflavone, 5-hydroxy-3,6,7,8,3',4'-hexamethoxyflavone, 5-hydroxy-6,7,4'-trimethoxyflavone, and 5-hydroxy-6,7,8,4'-tetramethoxyflavone. The method wa…

Asymmetric Vinylogous Mannich-Type Addition of α,α-Dicyanoalkenes to α-Fluoroalkyl Sulfinyl Imines

Abstract. The asymmetric vinylogous Mannich reaction (AVMR) of alfa,alfa-dicyanoalkenes with alfa-fluoroalkyl sulfinyl imines has been successfully accomplished. This transformation is unprecedented with fluorinated imines at the same time as the use of dicyanoalkenes in AVMR has been scarcely reported. Several fluorinated sulfinyl imines are compatible with the process, which gaves access to a family of chiral fluorinated amines with excellent level of stereocontrol. Interestingly, the selectivity found in our protocol is reverse to that encountered in analogous AVMR previously reported. Additionally, the synthetic applicability of the addition products has been exemplified with several tr…

CCDC 1578271: Experimental Crystal Structure Determination

Related Article: Álvaro Sanz-Vidal, Javier Torres, Vadim A. Soloshonok, Yi Zhu, Jianlin Han, Santos Fustero, Carlos del Pozo|2018|Adv.Synth.Catal.|360|366|doi:10.1002/adsc.201701284

CCDC 1578275: Experimental Crystal Structure Determination

Related Article: Álvaro Sanz-Vidal, Javier Torres, Vadim A. Soloshonok, Yi Zhu, Jianlin Han, Santos Fustero, Carlos del Pozo|2018|Adv.Synth.Catal.|360|366|doi:10.1002/adsc.201701284

CCDC 1578276: Experimental Crystal Structure Determination

Related Article: Álvaro Sanz-Vidal, Javier Torres, Vadim A. Soloshonok, Yi Zhu, Jianlin Han, Santos Fustero, Carlos del Pozo|2018|Adv.Synth.Catal.|360|366|doi:10.1002/adsc.201701284