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1 article(s) from Chahal, Mandeep K.

Advances in the use of metal-free tetrapyrrolic macrocycles as catalysts

Mandeep K. Chahal

Beilstein J. Org. Chem. 2024, 20, 3085–3112, doi:10.3762/bjoc.20.257

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Graphical Abstract

Figure 1: Chemical structures of the main tetrapyrrolic macrocycles studied in this review for their role as ...

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Figure 2: Calix[4]pyrroles 3 and 4 and an their acyclic analogue 5 used for the transformation of Danishefsky...

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Figure 3: Calixpyrrole-based organocatalysts 11 and 12 for the diastereoselective addition reaction of TMSOF ...

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Figure 4: (a) Chemical structures of macrocyclic organocatalysts used for the synthesis of cyclic carbonates ...

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Figure 5: Cuprous chloride-catalyzed aziridination of styrene (22) by chloramine-T (23) providing 1-tosyl-2-p...

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Figure 6: Chemical structures of the various porphyrin macrocycles (18, 25–41) screened as potential catalyst...

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Figure 7: Organocatalytic activity of distorted porphyrins explored by Senge and co-workers. Planar macrocycl...

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Figure 8: Chemical structures of H₂Et_xTPP (x = 0, 2, 4, 6, 8) compounds with incrementally increasing nonplan...

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Figure 9: Chemical structures of OxP macrocycles tested as potential organocatalysts for the conjugate additi...

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Figure 10: a) Fundamental structure of the J-aggregates of diprotonated TPPS₃ 53 and b) its use as a catalyst ...

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Figure 11: Chemical structures of amphiphilic porphyrin macrocycles used as pH-switchable catalysts based on i...

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Figure 12: a) Chemical structures of porphyrin macrocycles for the cycloaddition of CO₂ to N-alkyl/arylaziridi...

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Figure 13: Electron and energy-transfer processes typical for excited porphyrin molecules (Por = porphyrin mac...

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Figure 14: Proposed mechanism for the light-induced α-alkylation of aldehydes with EDA in the presence of H₂TP...

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Figure 15: a) Chemical structures of porphyrins screened as photoredox catalysts, b) model reaction of furan (...

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Figure 16: Porphyrin macrocycles H₂TPP (18) and PPIX 78 as photoreductants for the red light-induced C–H aryla...

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Figure 17: Porphyrin macrocycles H₂TPP (18) and PPIX 78 as photoredox catalyst for (a) α-alkylation of an alde...

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Figure 18: Corrole macrocycles 98–100 as photoredox catalysts for C–H arylation and borylation reactions. Adap...

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Figure 19: Proposed catalytic cycle of electrocatalytic generation of H₂ evolution using tetrapyrrolic macrocy...

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Figure 20: a) Chemical structures of tetrapyrrolic macrocycles 109, 73, and 110 used for oxygen reductions in ...

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Figure 21: a) Absorption spectra (left) of the air-saturated DCE solutions containing: 5 × 10⁻⁵ M H₂TPP (black...

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Figure 22: Chemical structures of N,N’-dimethylated saddle-distorted porphyrin isomers, syn-Me₂P 111 and anti-...

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Figure 23: Reaction mechanisms for the two-electron reduction of O₂ by a) syn-Me₂Iph 113 and b) anti-Me₂Iph 114...

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Figure 24: O₂/H₂O₂ interconversion using methylated saddle-distorted porphyrin and isophlorin (reduced porphyr...

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Figure 25: Chemical structures of distorted dodecaphenylporphyrin macrocycle 117 and its diprotonated form 118...

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Review

Published 27 Nov 2024

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