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The escape from flat aromatic architectures towards saturated structures enriched with an increased proportion of sp atoms (Fsp) has been harnessed as a drug design strategy. Chemical synthesis of drug-like saturated cycloalkanes, particularly in terms of the precise control of substituents either on the same or opposing faces of the ring plane, poses greater complexities than the assembly of their two-dimensional aromatic analogues. Reliable and predictable divergent synthesis of all isomers of multi-substituted cycloalkanes continues to pose a formidable challenge. Here we show a cobalt-catalysed process for achieving diastereodivergent synthesis. By strategically manipulating ligands, we accomplished diastereodivergent hydroalkylation of methylenecyclohexanes. This cobalt-catalysed system manifests exceptional resilience and versatility in synthesizing all isomers of disubstituted cyclohexanes and piperidines, as well as multi-substituted cyclohexanes, transcending inherent limited selective tendencies in other traditional synthesis strategies.
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http://dx.doi.org/10.1038/s41557-025-01885-x | DOI Listing |
Nat Chem
August 2025
State Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, China.
The escape from flat aromatic architectures towards saturated structures enriched with an increased proportion of sp atoms (Fsp) has been harnessed as a drug design strategy. Chemical synthesis of drug-like saturated cycloalkanes, particularly in terms of the precise control of substituents either on the same or opposing faces of the ring plane, poses greater complexities than the assembly of their two-dimensional aromatic analogues. Reliable and predictable divergent synthesis of all isomers of multi-substituted cycloalkanes continues to pose a formidable challenge.
View Article and Find Full Text PDFJ Am Chem Soc
July 2025
Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India.
Herein, we report an efficient method for the synthesis of atropisomers with distal 1,3-C-N diaxes using the cobalt/Salox system via C-H and N-H annulation with benzamide and sterically hindered alkynes. This one-step, step-economical process operates at room temperature with oxygen from air as the sole oxidant, removing the need for metal oxidants, photocatalysts, or electricity. The reaction is compatible with a broad range of arylamides and alkynes, providing high yields and excellent enantioselectivity (up to >99% ee).
View Article and Find Full Text PDFNature
July 2025
Department of Chemistry, Colorado State University, Fort Collins, CO, USA.
Natural chiral polymers, such as DNA, proteins, cellulose and poly[(R)-3-hydroxybutyrate] ((R)-P3HB), are prevalent in their enantiopure forms. Existing methods to synthesize enantiopure polymers focus on enantiospecific polymerization, in which only one specific enantiomer is obtained from the corresponding chiral monomer. Here we introduce a catalytic stereodivergent synthetic strategy to access all enantiopure di-isotactic poly(3-hydroxyalkanoate) (PHA) diastereomers from bacterial (R)-P3HB as the single chiral source.
View Article and Find Full Text PDFNat Commun
July 2025
Shanghai Key Laboratory of Molecular Engineering of Chiral Drugs, State Key Laboratory of Synergistic Chem-Bio Synthesis, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, PR China.
Despite their significant synthetic value, transition-metal-catalyzed asymmetric benzylic substitution reactions remain underexplored compared to the Tsuji-Trost reaction, primarily due to the inherent challenge associated with dearomatization. This reaction becomes much more challenging when constructing a stereogenic center at the benzyl position. Herein, we report a Pd/Cu co-catalyzed enantio- and diastereodivergent benzylic substitution reaction with benzyl geminal dicarboxylate, which is successfully applied for concurrent construction of two stereocenters at the benzyl position and nucleophile moiety.
View Article and Find Full Text PDFOrg Lett
July 2025
School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India.
Vinylsilanes are extensively utilized in organic synthesis, especially in stereospecific reactions. Silylmetalation has emerged as a highly effective alternative to hydrosilylation; however, the silylcopper and silylzinc reagents used are generally obtained from pyrophoric silyllithium or disilanes. We describe a catalyst-controlled diastereodivergent hydrosilylation employing novel solid reagents that eliminates the need for pyrophoric silyl lithium and is free of detrimental lithium ions.
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