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5. Stereocontrolled acid cyclization of (+)-hanphillin.

Author

Merkhatuly, N., Abeuova, S., Iskanderov, A., Aldabergenova, S., and Togizbaeva, B.

Subjects
*FORMIC acid, *PROTON transfer reactions, *CHEMICAL reactions, *BORENIUM ions, *LYONIUM ions, *CHARGE transfer
Abstract

The article presents a study that determines the action of formic acid of the stereocontrolled acid cyclization of hanphillin. It describes the method of the study that isolates the hanphillin from Noble Yarrow. It also notes the findings of the study which show that the acid-catalyzed 5,10-carbocyclization of compound I proceeds evidently through egioselective protonation of the electron donor.

Published
2014
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6. Reactions of (−)-estafiatin with acidic reagents.

Author

Merkhatuly, N., Iskanderov, A., Balmagambetova, L., and Togizbaeva, B.

Subjects
*CHEMICAL reactions, *GUAIANOLIDES, *YARROW, *CHEMICAL reagents, *BORON trifluoride, *INFRARED spectra, *NUCLEAR magnetic resonance spectroscopy
Abstract

The article discusses a study which examines the chemical reactions of guaianolide (-)-estafiatin obtained from noble yarrow (Achillea nobilis L.) with acidic reagents. It states that the reaction direction of the chemical in the study is largely defined by the reaction medium. Moreover, it notes the utilization of boron trifluoride-diethyl ether complex, infrared (IR) spectra, and nuclear magnetic resonance (NMR) spectra in the study of guaianolide (-)-estafiatin.

Published
2013
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