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- W4254588061 abstract "Starting from amino allenenes, available from amino alcohol in five steps, a new method for the preparation of 5,6-fused heterocycles is presented. The reaction, proceeding in moderate to good yields, involves insertion of an arylpalladium(II) halide into the allenic moiety, followed by intramolecular carbopalladation, and aromatic C-H bond activation. Inhibition of the β-hydride elimination, either by β-methyl substitution or, as shown, by a steric effect of the α-phenyl group, was found to be essential in promoting the tandem cyclization. The scope of this reaction includes the C-H activation of heteroaromatic systems such as furan, indole and thiophene." @default.
- W4254588061 created "2022-05-12" @default.
- W4254588061 date "2005-09-21" @default.
- W4254588061 modified "2023-09-27" @default.
- W4254588061 title "Tandem Cyclization of Allenenes to Tri- and Tetracyclic Heterocycles" @default.
- W4254588061 doi "https://doi.org/10.1055/s-2005-872211" @default.
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