98%
921
2 minutes
20
Cascade aza-Piancatelli reaction and [3+3]/[4+2] cycloaddition reactions are carried out using the ideality principles of pot, atom, and step economy (PASE) synthesis. The reaction resulted in generation of octahydro-4H-cyclopenta[b]pyridin-6-one scaffolds. Moreover, octahydro-5,7a-epoxycyclopenta[cd]isoindol-4-one frameworks of gracilamine alkaloid and a novel decahydro-1H-dicyclopenta[cd,hi]isoindol-6-one were also realized in good yields with excellent regio- and diastereo-selectivities.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/chem.202301058 | DOI Listing |
Talanta
September 2025
Department of Physical and Environmental Sciences, University of Toronto, Scarborough, Toronto, Ontario, M1C 1A4, Canada. Electronic address:
An one-pot method was used to prepare bimetallic nanozymes, with chitosan (CS) and l-tyrosine (L-Tyr) as stabilized dispersed colloidal solutions and a carrier for gold-platinum single atoms (Au-Pt SAs), which exhibited excellent peroxidase activity. A colorimetric method based on CS/L-Tyr/Au-Pt SAs nanozymes was constructed for the colorimetric detection of quercetin (QR) in human serum and orange juice. The synthesized bimetallic nanozymes were characterized by SEM, TEM, HAADF-STEM, FT-IR, XRD and XPS techniques to demonstrate the successful synthesis of CS/L-Tyr/Au-Pt SAs nanozymes.
View Article and Find Full Text PDFChemSusChem
September 2025
Organic Chemistry Institute, University of Münster, Corrensstraße 36, 48149, Münster, Germany.
A three-step, one-pot, sequential cascade starting from simple feedstocks to increase complexity toward value-added chiral synthetic building blocks is reported. This is achieved by precisely integrating organic photocatalysis and noncovalent organocatalysis, often operating at dissimilar conditions and reaction media. In particular, this strategy is used to enable the direct transformation of readily available benzylic substrates, such as methylbenzenes, benzyl alcohols, or amines, into enantioenriched α-aminonitriles by benzylic CH photooxidation to their corresponding aldehydes, followed by in situ imine formation and final asymmetric organocatalytic Strecker reaction.
View Article and Find Full Text PDFJ Org Chem
September 2025
State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory of Medicinal for Natural Resource, Ministry of Education and Yunnan Province, School of Pharmacy, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China.
Herein, we report an efficient and general one-pot multicomponent strategy, innovatively developed for the construction of δ,γ-unsaturated β-hydroxy nitrile scaffolds. Using readily available aldehydes and ketones as starting materials and TMSCFBr as a difluorocarbene precursor, the transformation proceeds via tandem Aldol condensation, a difluorocarbene electrophilic reaction, and hydrolysis. Mechanistic studies revealed that the difluorocarbene activates the oxygen atom of the α,β-unsaturated carbonyl group through electrophilic orientation, significantly enhancing the electrophilicity of the carbonyl carbon, thereby driving the reaction to proceed with high selectivity via a 1,2-addition pathway.
View Article and Find Full Text PDFJACS Au
August 2025
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
The generation of metal carbenes from readily available allenes represents a remarkable advance in metal carbene chemistry. However, most of these transformations are mainly restricted to the noble-metal catalysts (Au and Pt). Here, a copper-catalyzed desymmetric cyclization reaction of divinylallenes is described, enabling the practical and atom-economical synthesis of a diverse array of valuable triazolo-fused pyridazines and tetracyclic N-heterocycles by a presumable copper carbene intermediate and a highly selective 1,2-N shift process.
View Article and Find Full Text PDFOrg Biomol Chem
August 2025
Dalhousie University, Department of Chemistry, PO Box 15, 000 6243 Alumni Crescent, Halifax, Nova Scotia, B3H 4R2, Canada.
This study presents a one-pot synthesis of phosphorus(III) benzoxaboroles using hypophosphorous acid to yield H-phosphinates. These H-phosphinates, together with their phosphonate congeners, were systematically evaluated for their physicochemical properties, including p, diol-binding affinity, and oxidative stability in buffer. The presence of the phosphorus atom as either phosphorus(III) or phosphorus(V) provided high aqueous water solubility.
View Article and Find Full Text PDF