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An International Journal for Reviews and Communications in Heterocyclic ChemistryWeb Edition ISSN: 1881-0942
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Announcement
Yoshito Kishi (1937-2023)

Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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December 24, 2019
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e-Journal
Abstract
Published online: 20th May, 2021
■ Uncommon Reactivity of a Seco-Oxacassane Diterpenoid and Antiproliferative Activity of Some Derivatives
Alexia Hernández-Jiménez, Ledy De-la-Cruz-Martínez, Raúl Velasco-Azorsa, Reyna Zeferino-Díaz, José G. Alvarado-Rodríguez, Luis H. Mendoza-Huizar, J. Jesús Manríquez-Torres, Horacio Almanza-Reyes, Carlos M. Cerda-Garcia-Rojas, Pedro Joseph-Nathan, and J. Martín Torres-Valencia*
*Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, km 4.5 Carretera Pachuca-Tulancingo, Mineral de la Reforma, Hidalgo 42184, México
Abstract
The main diterpenoid of Acacia schaffneri, 7,8-seco-7,8-oxacassa-13,15-dien-7-ol-17-al (1), has two aldehydes of which one is protected as a ε-lactol. The free aldehyde resisted to afford the carboxylic acid using reagents with different oxidative strength, although 1 gave oxime 2 when treated with hydroxylamine, β-hydroxyketone 3 after addition of acetone, aldo-ε-lactone 4 whereby only the lactol was oxidized when using Jones reagent, and epoxyformate 5 after Baeyer-Villiger treatment. Hydrolysis of 5 with NaHCO3 gave 6. Structures 2–6 followed from physical and spectral data including X-ray diffraction. All compounds showed antiproliferative activity similar to some chemotherapeutic drugs against C2C12, L929, SiHa, and MDA-MB-231 cell lines.
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