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Bowl-shaped fullerene fragments, as-indaceno[3,2,1,8,7, 6-pqrstuv]picenes, can be synthesized by a double palladium-mediated cyclization in good to excellent yield. The structure of 1, 8-dimethyl as-indaceno[3,2,1,8,7,6-pqrstuv]picene was confirmed by X-ray analysis. The high yields, mild reaction conditions, and wide range of functional group tolerance are advantages of this method over existing FVP and reductive coupling routes to bowl-shaped PAHs.
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Wang et al. (2000) studied this question.
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