Controllable Regioselective [3+2] Cyclizations of -CF Imidoyl Chlorides and PhPNNC: Divergent Synthesis of -CF Triazoles.

Org Lett

Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China.

Published: June 2024

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.

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.orglett.4c01275DOI Listing

Publication Analysis

Top Keywords

-cf imidoyl
8
imidoyl chlorides
8
controllable regioselective
4
regioselective [3+2]
4
[3+2] cyclizations
4
-cf
4
cyclizations -cf
4
chlorides phpnnc
4
phpnnc divergent
4
divergent synthesis
4

Similar Publications

Condition-Controlled Rh(III)-Catalyzed Chemodivergent Cyclization of 2-Arylpyridines with CF-Imidoyl Sulfoxonium Ylides via Triple C-H Activation.

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 PDF

Rhodium(III)-Catalyzed Coupling of Quinolin-8-carboxaldehydes with CF-Imidoyl Sulfoxonium Ylides by Chelation-Assisted C(sp)-H Bond Activation for the Synthesis of Trifluoromethyl-Substituted Enaminones.

J 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 PDF

Synthesis of CF-Isoquinolinones and Imidazole-Fused CF-Isoquinolinones Based on C-H Activation-Initiated Cascade Reactions of 2-Aryloxazolines.

J 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 PDF

Controllable Regioselective [3+2] Cyclizations of -CF Imidoyl Chlorides and PhPNNC: Divergent Synthesis of -CF Triazoles.

Org 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 PDF

-CF Imidoyl Chlorides: Scalable -CF Nitrilium Precursors for the Construction of -CF Compounds.

Org 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.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!