A novel approach was developed for the synthesis of highly substituted indene derivatives, using an FeCl(3) catalyzed Prins-type cyclization reaction which was further applied in the total synthesis of jungianol and epi-jungianol.
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http://dx.doi.org/10.1021/ol3032347 | DOI Listing |
Molecules
July 2024
State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China.
Functionalized imidazo[1,2-α]pyridines are important scaffolds in pharmaceuticals. Herein, we present an efficient 3-sulfonylmethylation protocol for imidazo[1,2-α]pyridines by sodium sulfinates in DMA and HO (2:1) via an FeCl-catalyzed three-component coupling reaction. Various sulfonylmethyl imidazo[1,2-α]pyridines were thus afforded in high yields with excellent functional group tolerance.
View Article and Find Full Text PDFACS Appl Mater Interfaces
June 2024
Nanotechnology and Functional Materials, Department of Materials Science and Engineering, Uppsala University, Uppsala 751 03, Sweden.
In the present work, we explored Lewis acid catalysis, via FeCl, for the heterogeneous surface functionalization of cellulose nanofibrils (CNFs). This approach, characterized by its simplicity and efficiency, facilitates the amidation of nonactivated carboxylic acids in carboxymethylated cellulose nanofibrils (c-CNF). Following the optimization of reaction conditions, we successfully introduced amine-containing polymers, such as polyethylenimine and Jeffamine, onto nanofibers.
View Article and Find Full Text PDFChem Commun (Camb)
May 2024
College of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, 314001, P. R. China.
Here, we describe an iron-catalyzed benzylic C-H thiolation of alkylarenes photoinduced ligand-to-metal charge-transfer. The protocol features operational simplicity, mild reaction conditions, and the use of FeCl as catalyst and thiols/disulfides as sulfur sources, which enables the transformation of diverse benzylic C-H bonds into C-S bonds with a high efficiency.
View Article and Find Full Text PDFOrg Lett
May 2024
Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central Minzu University, Wuhan 430074, China.
An iron-catalyzed photochemical sulfinamidation of hydrocarbons with -sulfinylamines has been developed. The merger of ligand-to-metal charge transfer (LMCT) of FeCl with hydrogen atom transfer (HAT) process is the key for the generation of alkyl radicals from hydrocarbons, and the resultant alkyl radicals were readily trapped by -sulfinylamines to produce structurally diverse sulfinamides. Contrary to traditional methods that inevitably use sensitive organometallic reagents and prefunctionalized substrates, our approach features simple operation and the wide availability of starting materials.
View Article and Find Full Text PDFJ Org Chem
February 2024
Key Laboratory of Low-Carbon and Green Agriculture Chemistry in Universities of Shandong, Key Laboratory of Agricultural Film Application of Ministry of Agriculture and Rural Affairs, College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, Shandong, China.
We successfully achieved the phosphorylation of secondary aromatic alcohols with H-phosphine oxides (less developed system) using phosphotungstic acid as a catalyst in dimethyl carbonate. The system was simple and environmentally friendly and showed better activity than traditional Lewis or Brønsted acids such as FeCl, -TsOH·HO, etc., generating up to a 97% isolated yield.
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