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Keywords
- Asymmetric Organocatalysis
- Asymmetric Michael Addition Reactions
- Modified Cinchona Alkaloids
- Chiral Phosphoric Acid
- Amide Catalysis
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
In this Chapter, the citations of Fig. 3 “Chiral binol-based phosphoric acids” and Fig. 4 “Representative modified cinchona alkaloids” are incorrect
Fig. 3 is erroneously cited on p. 164, in the first sentence of Sect. 3.1:
3.1 Asymmetric Michael Addition Reactions
Chen reported an asymmetric direct vinylogous Michael addition (Fig. 3) of α,α- adicyanoolefins to enals (Scheme 13) [64. …
Fig. 3 should correctly replace the citation of Fig. 4 on p. 177, in Sect. 5.1:
5.1 Phosphoric Acid and Amide Catalysis
Chiral phosphoric acids of type 116, were first demonstrated to catalyze Mannich reaction independently by Akiyama and Terada [97, 98]. This type of organocatalysts have unique structural feature containing a strong acidic hydroxy and a Lewis basic phosphoryl oxygen, which allow for the simultaneous activation of both nucleophiles and electrophiles by hydrogen bonding interactions. Moreover, the tunable 3,3’-substituents provide a diverse spectrum of catalysts for different enantioselective transformations. Indeed, they have been privileged organocatalysts widely applicable to a broad scope of asymmetric transformations (Fig. 4 Fig. 3) [99–101].
Fig. 4 should correctly be cited on p. 189, Sect. 6
6 Chiral Organic Base Catalysis
An asymmetric direct vinylogous Michael reaction of activated vinyl malononitriles to nitroolefins catalyzed by modified cinchona alkaloid [DHQD]2PYR (Fig. 4) was reported by Chen (Scheme 61) [135]. Highly functionalized products with two vicinal chiral centers were generated with exclusive ??-selectivity and high diastereoand enantioselectivity.
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Liu, W.J., Li, N., Gong, L.Z. (2011). Erratum to: Asymmetric Organocatalysis. In: Ma, S. (eds) Asymmetric Catalysis from a Chinese Perspective. Topics in Organometallic Chemistry, vol 36. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-19472-6_11
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DOI: https://doi.org/10.1007/978-3-642-19472-6_11
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