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- W4244874464 abstract "Abstract Double ring expansion from a 5,15‐diarylporphyrin to a 5,16‐diaryl‐10,11,21,22‐tetradehydro[20]porphyrin(2.1.2.1) occurred through a reaction sequence consisting of oxidation with PbO 2 to 5,15‐dioxoporphodimethene, a Corey–Fuchs reaction with tetrabromomethane in the presence of triphenylphosphine, and Fritsch–Buttenberg–Wiechell rearrangement triggered by tert ‐butyllithium. The obtained tetradehydro[20]porphyrin(2.1.2.1) and its mono‐ and dihydrogenated congeners exhibited 20 π antiaromatic character, whereas overhydrogenated congeners bearing a saturated bridge were nonaromatic owing to disrupted π conjugation." @default.
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- W4244874464 date "2016-05-19" @default.
- W4244874464 modified "2023-10-01" @default.
- W4244874464 title "Double Ring Expansion from an Aromatic [18]Porphyrin(1.1.1.1) to an Antiaromatic [20]Porphyrin(2.1.2.1)" @default.
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- W4244874464 doi "https://doi.org/10.1002/ange.201602874" @default.
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