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- W3138993209 abstract "The catalytic application of the bis(amino)cyclopropenium ion has been investigated in conjugate addition reactions. The hydrogen atom, which is attached to the cyclopropene ring of bis(amino)cyclopropenium salts, is moderately acidic and can potentially serve as a hydrogen-bond donor catalyst in some organic transformations. This hypothesis has been successfully realized in the 1,6-conjugate addition reactions of p-quinone methides with various nucleophiles such as indole, 2-naphthol, thiols, phenols, and so forth. The spectroscopic studies (NMR and UV-vis) as well as the deuterium isotope labeling studies clearly revealed that the hydrogen atom (C-H) that is present in the cyclopropene ring of the catalyst is indeed solely responsible for catalyzing these transformations. In addition, these studies also strongly indicate that the C-H hydrogen of the cyclopropene ring activates the carbonyl group of the p-quinone methide through hydrogen bonding." @default.
- W3138993209 created "2021-03-29" @default.
- W3138993209 creator A5001221275 @default.
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- W3138993209 creator A5033090097 @default.
- W3138993209 creator A5049153836 @default.
- W3138993209 creator A5067890483 @default.
- W3138993209 date "2021-03-15" @default.
- W3138993209 modified "2023-10-16" @default.
- W3138993209 title "Bis(amino)cyclopropenium Ion as a Hydrogen-Bond Donor Catalyst for 1,6-Conjugate Addition Reactions" @default.
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