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- W2063180047 abstract "A straightforward and modular preparative approach to 1,3,5-triaroylbenzene-based functionalized cyclophane ring systems has been developed. The key cyclophane-forming macrocyclization reaction was accomplished during the course of a regioselective cross-benzannulation between bis(aryl ethynyl) ketone and enaminone reactants. Macrocyclic products with ring sizes ranging from 18- to 22-membered were successfully constructed. The composition of the tether connecting the two aryl ethynyl ketone fragments can be easily varied; consequently, this method is suitable for construction of a diverse range of structurally distinct cyclophane products. To illustrate this feature, cyclophanes possessing xylyl, alkyl, di(ethylene triamine), and di(ethylene oxy) bridging units were synthesized in isolated yields of 11−46%. Three new cyclophanes (calixarene-like macrocyles 8 and 9, as well as crownophane 18) were structurally characterized by X-ray diffractometry." @default.
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- W2063180047 date "2002-05-15" @default.
- W2063180047 modified "2023-10-16" @default.
- W2063180047 title "An Enaminone-Directed Benzannulation/Macrocyclization Approach to Cyclophane Ring Systems" @default.
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- W2063180047 doi "https://doi.org/10.1021/jo0256181" @default.
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