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Download fileSynthesis of Fullerene–Fluorene Dyads through the Platinum-Catalyzed Reactions of [60]Fullerene with 9‑Ethynyl‑9H‑fluoren-9-yl Carboxylates
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posted on 2019-06-17, 00:00 authored by Michio Yamada, Mayu Takizawa, Yoko Nukatani, Mitsuaki Suzuki, Yutaka MaedaThe single-step regio- and stereoselective
platinum-catalyzed reactions
of [60]fullerene with a series of 9-ethynyl-9H-fluoren-9-yl
carboxylates afforded fullerene–fluorene dyads in their [2
+ 2] cycloaddition forms. The presented reactions represent the first
examples of the use of easily accessible fluorenyl carboxylates as
fluorenylideneallene precursors. In addition, the single-crystal X-ray
structure of one of the dyads reveals a distorted cyclobutane ring.
Furthermore, the dyad forms a layered structure with close-packed
arrays of C60 spheres in its crystals.