Journal
CHEMICAL REVIEWS
Volume 121, Issue 8, Pages 4373-4505Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemrev.0c00736
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Funding
- Spanish Ministry of Economy and Competitiveness [CTQ2015-69136-R, PID2019-1092336RB-I00, CTQ2016-74878-P, PID2019-104904GB-I00]
- Spanish Ministry of Economy and Competitiveness (Severo Ochoa Excellence Accreditation 2014-2018) [SEV-2013-0319]
- European Regional Development Fund (AEI/FEDER, UE)
- Catalan Government [2017SGR1472, 2017SGR1139]
- ICREA Foundation (ICREA Academia award)
- CERCA Programme/Generalitat de Catalunya
- Swedish Research Council [2019-04042]
- Knut and Alice Wallenberg Foundation [KAW 2016.0072]
- La Caixa Foundation
- Irish Research Council [EPSPG/2014/110, EPSPG/2015/84]
- APC Ltd.
- Bristol-Myers Squib
- Irish Research Council (IRC) [EPSPG/2015/84, EPSPG/2014/110] Funding Source: Irish Research Council (IRC)
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This review covers the evolution, mechanistic understanding, and recent advances in enantioselective Pd-catalyzed allylic substitution, decarboxylative, and oxidative allylic substitutions. The catalytic data and examples of their application are collected, along with discussions on key mechanistic aspects for high selectivity and comparison with other metals. Different nucleophiles employed and ligand types for improved results in asymmetric allylic substitutions are highlighted.
This Review compiles the evolution, mechanistic understanding, and more recent advances in enantioselective Pd-catalyzed allylic substitution and decarboxylative and oxidative allylic substitutions. For each reaction, the catalytic data, as well as examples of their application to the synthesis of more complex molecules, are collected. Sections in which we discuss key mechanistic aspects for high selectivity and a comparison with other metals (with advantages and disadvantages) are also included. For Pd-catalyzed asymmetric allylic substitution, the catalytic data are grouped according to the type of nucleophile employed. Because of the prominent position of the use of stabilized carbon nucleophiles and heteronucleophiles, many chiral ligands have been developed. To better compare the results, they are presented grouped by ligand types. Pd-catalyzed asymmetric decarboxylative reactions are mainly promoted by PHOX or Trost ligands, which justifies organizing this section in chronological order. For asymmetric oxidative allylic substitution the results are grouped according to the type of nucleophile used.
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