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1 article(s) from George, Michael W

Continuous N-alkylation reactions of amino alcohols using γ-Al₂O₃ and supercritical CO₂: unexpected formation of cyclic ureas and urethanes by reaction with CO₂

Emilia S. Streng,
Darren S. Lee,
Michael W. George and
Martyn Poliakoff

Beilstein J. Org. Chem. 2017, 13, 329–337, doi:10.3762/bjoc.13.36

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Scheme 1: Target reaction – intramolecular cyclisation of 1 followed by N-methylation with methanol to yield ...

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Figure 1: Simplified schematic demonstrating a self-optimising reactor [34,35,37,44]. The reagents are pumped into the sys...

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Figure 2: Result of the SNOBFIT optimisation for N-methylpiperidine (2b) with and without CO₂ showing yields ...

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Scheme 2: Cyclisation and N-alkylation of 1,4- and 1,6-amino alcohols.

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Scheme 3: a) Reactions highlighting the incorporation of CO₂ in to 16. b) High temperature reaction of 15 yie...

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Scheme 4: Summary of products obtained from the reactions of amino alcohols over γ-Al₂O₃ in scCO₂.

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Figure 3: Diagram of the high pressure equipment used in the experiments.

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Published 21 Feb 2017

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Continuous N-alkylation reactions of amino alcohols using γ-Al2O3 and supercritical CO2: unexpected formation of cyclic ureas and urethanes by reaction with CO2

Continuous N-alkylation reactions of amino alcohols using γ-Al₂O₃ and supercritical CO₂: unexpected formation of cyclic ureas and urethanes by reaction with CO₂