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Elucidation of Racemization Process of Azaspirene Skeleton in Neutral Aqueous Media

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journal contribution
posted on 01.11.2018, 00:00 by Shun Hirasawa, Ken Mukai, Shinnosuke Sakai, Shinnosuke Wakamori, Takahiro Hasegawa, Kazunori Souma, Nobuhiro Kanomata, Narihito Ogawa, Mamoru Aizawa, Makoto Emoto
Azaspirene and related congeners, which possess various biological activities, have a unique spirocyclic core structure. However, there are few studies on the chemical properties of (−)-azaspirene, despite the fact that it may provide important insights into unveiling the biosynthetic pathway. Here, we report a nine-step chemical synthesis of an azaspirene analogue with a new finding that the natural (−)-azaspirene skeleton easily racemizes in neutral aqueous media.

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