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- W4247258987 abstract "<p>A new class of bifunctional hydrogen-bond donor organocatalyst using oxoporphyrinogens with increased intramolecular hydrogen-bond donor distances is reported. Oxoporphyrinogens are highly non-planar rigid macrocycles containing a multiple hydrogen bond forming binding site. In this work we report the first example of non-planar OxPs as hydrogen-bond donor catalysts. The introduction of β-substituents is key to the catalytic activity and the catalysts are able to catalyze 1,4-conjugate additions and sulfa-Michael additions, as well as, Henry and aza-Henry reactions at low catalyst loadings (≤ 1 mol%) under mild conditions. Preliminary mechanistic studies have been carried out and a possible reaction mechanism has been proposed based on the bi-functional activation of both substrates through hydrogen-bonding interactions.</p>" @default.
- W4247258987 created "2022-05-12" @default.
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- W4247258987 date "2019-08-20" @default.
- W4247258987 modified "2023-09-29" @default.
- W4247258987 title "Molecular Engineering of β-Substituted Oxoporphyrinogens for Hydrogen-Bond Donor Catalysis" @default.
- W4247258987 doi "https://doi.org/10.26434/chemrxiv.9685481" @default.
- W4247258987 hasPublicationYear "2019" @default.
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