Presented herein are two distinct regiodivergent [3+2] cyclization reactions between -CF imidoyl chlorides and -isocyaniminotriphenylphosphorane (NIITP) that include flexible modulation of the electronic properties of NIITP. The regioselectivity of reactions was different in the absence and presence of the Mo catalyst. The approach provides alternative efficient and scalable routes for -CF triazole synthesis, demonstrating a broad substrate scope, excellent functional group tolerance, and practical advantages.
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http://dx.doi.org/10.1021/acs.orglett.4c01275 | DOI Listing |
Org Lett
January 2025
Engineering Research Center of Tropical Medicine Innovation and Transformation of Ministry of Education, International Joint Research Center of Human-machine Intelligent Collaborative for Tumor Precision Diagnosis and Treatment of Hainan Province, Hainan Provincial Key Laboratory of Research and Development on Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China.
A condition-controlled Rh(III)-catalyzed selective synthesis of CF-substituted indoles and pyrido[2,1-]isoindoles from 2-arylpyridines and CF-imidoyl sulfoxonium ylides has been developed. The Cp*Rh(MeCN)(SbF)/HFIP system afforded CF-substituted indoles via triple C-H activation, while the [Cp*RhCl]/MeCN condition selectively furnished CF-substituted pyrido[2,1-]isoindoles through C-H [4 + 1] annulation. The notable advantages of this developed method included readily available starting materials, broad substrate scope, and excellent chemoselectivity.
View Article and Find Full Text PDFJ Org Chem
August 2024
School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
A rhodium(III)-catalyzed aldehydic C(sp)-H imidoylmethylation of quinolin-8-carboxaldehydes with CF-imidoyl sulfoxonium ylides (TFISYs) has been developed for the generation of α-imino ketones, which could be readily tautomerized to enaminones in moderate to excellent yields. In the transformation, TFISYs act as a kind of masked alkenylating reagents for the aldehyde moiety, and the obtained CF-enaminone products have been successfully converted into other useful trifluoromethyl-substituted heterocycles.
View Article and Find Full Text PDFJ Org Chem
July 2024
Pingyuan Laboratory, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China.
Presented herein are novel syntheses of CF-isoquinolinones and imidazole fused CF-isoquinolinones based on the cascade reactions of 2-aryloxazolines with trifluoromethyl imidoyl sulfoxonium ylides. The formation of CF-isoquinolinone involves an intriguing cascade process including oxazolinyl group-assisted aryl alkylation through C(sp)-H bond metalation, carbene formation, migratory insertion, and proto-demetalation followed by intramolecular condensation and water-promoted oxazolinyl ring-scission. With this method, the isoquinolinone scaffold tethered with valuable functional groups was effectively constructed.
View Article and Find Full Text PDFOrg Lett
June 2024
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China.
Presented herein are two distinct regiodivergent [3+2] cyclization reactions between -CF imidoyl chlorides and -isocyaniminotriphenylphosphorane (NIITP) that include flexible modulation of the electronic properties of NIITP. The regioselectivity of reactions was different in the absence and presence of the Mo catalyst. The approach provides alternative efficient and scalable routes for -CF triazole synthesis, demonstrating a broad substrate scope, excellent functional group tolerance, and practical advantages.
View Article and Find Full Text PDFOrg Lett
April 2024
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry Northeast Normal University, 5268 Renmin Street, Changchun, 130024, China.
A wide range of -CF imidoyl chlorides were synthesized for the first time via the -trifluoromethylation of nitriles in DCM by using AlCl-activated PhICFCl as the CF source. The reactions of them with N/O-/S-nucleophiles, as well as with 1,3-dipoles, were carried out to efficiently deliver -CF amidines/imidates/thioimidates and -CF azoles, demonstrating that they are a class of scalable NCF-containing synthons in the synthesis of -CF compounds.
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