Shared posts
[ASAP] P450DA Monooxygenase-Catalyzed Chemoselective and Enantiodivergent Epoxidation of Unactivated Alkenes
Engineering a photoenzyme to use red light
Publication date: Available online 16 October 2024
Source: Chem
Author(s): Jose M. Carceller, Bhumika Jayee, Claire G. Page, Daniel G. Oblinsky, Gustavo Mondragón-Solórzano, Nithin Chintala, Jingzhe Cao, Zayed Alassad, Zheyu Zhang, Nathaniel White, Danny J. Diaz, Andrew D. Ellington, Gregory D. Scholes, Sijia S. Dong, Todd K. Hyster
[ASAP] Nature’s Toolbox for the Hydrolysis of Lactams and Cyclic Imides
The iron-catalysed Suzuki coupling of aryl chlorides
Nature Catalysis, Published online: 17 October 2024; doi:10.1038/s41929-024-01234-0
The replacement of palladium with other metal catalysts in C–C bond-forming reactions is attractive in terms of costs and sustainability. Now an iron-based catalyst is successfully employed in the Suzuki cross-coupling of aryl chlorides with aryl boronic esters activated with tert-butyl lithium.[ASAP] Design and Synthesis of Artificial FAD Cofactors for the Light-Triggered Covalent Flavinylation of Flavoenzymes
Fe‐Catalyzed α‐C(sp3)–H Amination of N‐Heterocycles
Nitrogen-heterocycles are privileged structures in both marketed drugs and natural products. On the other hand, C–H amination reactions furnish unconventional and straightforward approaches for the construction of C–N bonds. Yet, most of the known methods rely on precious metal catalysts. Herein we report a site-selective intermolecular C(sp3)–H amination of N-heterocycles, catalyzed by inexpensive FeCl2, which allows the functionalization of a wide range of pharmaceutically relevant cyclic amines. The C–H amination occurs site-selectively in α-position to the nitrogen atom, even when weaker C–H bonds are present, and furnishes Troc-protected aminals or amidines. The method employs the N-heterocycle as limiting reagent and is applicable to the late-stage functionalization of complex molecules. Its synthetic potential was further illustrated through the derivatization of α-aminated products and the application to a concise total synthesis of the reported structure for senobtusin. Mechanistic studies allowed to propose a plausible reaction mechanism involving a turnover-limiting Fe-nitrene generation followed by fast H atom transfer and radical rebound.
[ASAP] Highly Enantioselective Decarboxylative Difluoromethylation
3d-Metal-Catalyzed Single-Electron-Transfer-Induced Conversion of Carboxylic Acids and Their Equivalents
Synlett
DOI: 10.1055/a-2417-1070
This account describes the latest developments on 3d-metal-catalyzed single-electron-transfer (SET)-induced strategies that use carboxylic acids and their synthetic equivalents as substrates. In general, 3d-metal-promoted SET-mediated transformations of free carboxylic acids proceed readily via the formation of carboxylate radicals, whilst those of carboxylic acid equivalents, bearing an N-donor substituent, proceed via the formation of α-carbo radicals. The advantages of these strategies combine the low-cost of carboxylic acid starting materials and 3d metal catalysts with the possibility of realizing structurally diverse ranges of compounds in an atom- and step-economic manner. Developments primarily achieved by our group and a few by other researchers on this topic are discussed in this account.1 Introduction2 Mechanistic Considerations of 3d-Metal-Catalyzed SET-Mediated Transformations3 Developments Based on SET-Mediated Transformations of Carboxylic Acids4 Developments Based on SET-Mediated Transformations of Carboxylic Acid Equivalents5 Conclusion and Outlook
[...]
Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, Germany
Article in Thieme eJournals:
Table of contents | Abstract | Full text
[ASAP] Multicomponent Construction of Tertiary Alkylamines by Photoredox/Nickel-Catalyzed Aminoalkylation of Organohalides
[ASAP] Regiodivergent Radical-Relay Alkene Dicarbofunctionalization
Bracafun fact: Ruben Martin (ICIQ) was my plan B to do MSc project with
[ASAP] Same Day Access to Folded Synthetic Proteins
[ASAP] Engineering Neuroglobin for Synthesis of Chiral Organoborons via Carbene B–H Insertion
Asymmetric phase-transfer catalysis
Nature Reviews Chemistry, Published online: 09 October 2024; doi:10.1038/s41570-024-00642-x
Chiral phase-transfer catalysts are practical and powerful organocatalysts for asymmetric synthesis. This Review illustrates notable recent advances of chiral phase-transfer catalysts, including challenges, limitations and potential solutions, as well as future opportunities to improve sustainability.[ASAP] Expanding the Genetic Code of Bioelectrocatalysis and Biomaterials
Nobel prizes are globally unrepresentative — the nomination process must be opened up
Nature, Published online: 08 October 2024; doi:10.1038/d41586-024-03267-8
The geography of science is changing. As a result, a big push is needed to broaden the pool of scientists eligible to nominate their peers for Nobel prizes.Emergence of a distinct mechanism of C–N bond formation in photoenzymes
Nature, Published online: 08 October 2024; doi:10.1038/s41586-024-08138-w
Emergence of a distinct mechanism of C–N bond formation in photoenzymesPhysics Nobel scooped by machine-learning pioneers
Nature, Published online: 08 October 2024; doi:10.1038/d41586-024-03213-8
John Hopfield and Geoffrey Hinton pioneered computational methods that enabled the development of neural networks.Medicine Nobel awarded for gene-regulating ‘microRNAs’
Nature, Published online: 07 October 2024; doi:10.1038/d41586-024-03212-9
Victor Ambros and Gary Ruvkun identified a class of tiny molecules that have a crucial role in controlling gene expression.[ASAP] Asymmetric Hydrogenation of Naphthalenes with Molybdenum Catalysts: Ligand Design Improves Chemoselectivity
[ASAP] Divergent Enantioselective Access to Diverse Chiral Compounds from Bicyclo[1.1.0]butanes and α,β-Unsaturated Ketones under Catalyst Control
[ASAP] Annulation Producing Diverse Heterocycles Promoted by Cobalt Hydride
Rationally Grafting A Synthetic Multinuclear Metal Center into a Cytokine: A Dual-Functional Designer Metalloenzyme
[ASAP] Radical Polarity
From geranium lakes to catalysis with light
Nature Chemistry, Published online: 03 October 2024; doi:10.1038/s41557-024-01636-4
Adam Noble discusses the diverse uses of eosin Y over its 150-year history, from its origin as a dye and pigment used by post-impressionist masters to its versatile reactivity as a catalyst in visible light photochemistry.Cobalt-catalysed desymmetrization of malononitriles via enantioselective borohydride reduction
Nature Chemistry, Published online: 04 October 2024; doi:10.1038/s41557-024-01592-z
Malononitriles are widely used precursors for the synthesis of diverse enantioenriched nitrogen-containing molecules, but controlling the stereochemistry of their asymmetric transformations is challenging. Now, the desymmetric reduction of disubstituted malononitriles to chiral amines has been achieved, enabled by a bidentate ligand with extended flanks that can differentiate between the precursor’s nitrile groups through tailored steric pairings.[ASAP] Visible-Light-Mediated Trifluoroalkylation of Isoquinolines via Three-Component Minisci-Type Reaction
Synthesis of metal-binding amino acids
DOI: 10.1039/D4OB01326C, Review Article
Contemporary approaches for the synthesis of non-proteinogenic metal-binding amino acids are reviewed.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry
[ASAP] Biocatalytic Synthesis of α-Amino Esters via Nitrene C–H Insertion
BracaAnd they keep going…
[ASAP] Noncanonical Amino Acids: Bringing New-to-Nature Functionalities to Biocatalysis
Braca🔥🦍
Biocatalytic asymmetric aldol addition into unactivated ketones
Nature Chemistry, Published online: 27 September 2024; doi:10.1038/s41557-024-01647-1
Aldolases have been a mainstay in synthesis, but their scope has been limited to activated electrophiles. Now carbon–carbon bond formation with ketone electrophiles is enabled by transaldolases, which form a strong nucleophile that is resistant to protonation. This chemistry enables convergent synthesis of non-canonical amino acids bearing tertiary alcohol side chains.