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- W2952693906 abstract "Pauson-Khand reactions are carried out with different substituted aromatic enynes, yielding tricyclic cyclopentenones related to natural products such as chromenes. Enynes are easily obtained in a two-step approximation from the corresponding salicylaldehydes. The reaction is promoted by dissolved TMANO (trimethylamine N-oxide) and/or 4 A molecular sieves. This new way of induction for the Pauson-Khand reaction increases yields remarkably, allowing the reaction of some substituted alkenes which fail to react in the absence of the zeolite. Isomerization of the double bond of the cyclopentenone ring is observed except when nonterminal triple bonds are used. For trisubstituted alkenes, an interrupted Pauson-Khand process is observed with moderate yields." @default.
- W2952693906 created "2019-06-27" @default.
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- W2952693906 date "2000-05-05" @default.
- W2952693906 modified "2023-10-18" @default.
- W2952693906 title "Synthesis of Tricyclic Aromatic Compounds by the Intramolecular Pauson−Khand Reaction Promoted by Molecular Sieves<sup>,</sup><sup>1</sup>" @default.
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- W2952693906 doi "https://doi.org/10.1021/jo0001232" @default.
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