35989-02-7Relevant academic research and scientific papers
Synthesis of Bis-heteroaryls Using Grignard Reagents and Pyridylsulfonium Salts
Horan, Alexandra M.,Duong, Vincent K.,McGarrigle, Eoghan M.
supporting information, p. 9089 - 9093 (2021/11/30)
Herein are reported ligand-coupling reactions of Grignard reagents with pyridylsulfonium salts. The method has wide functional group tolerance and enables the formation of bis-heterocycle linkages, including 2,4′-, 2,3′-, and 2,2′-bipyridines, as well as pyridines linked to pyrimidines, pyrazines, isoxazoles, and benzothiophenes. The methodology was successfully applied to the synthesis of the natural products caerulomycin A and E.
Sulfur(IV)-Mediated Unsymmetrical Heterocycle Cross-Couplings
Zhou, Min,Tsien, Jet,Qin, Tian
supporting information, p. 7372 - 7376 (2020/04/09)
Despite the tremendous utilities of metal-mediated cross-couplings in modern organic chemistry, coupling reactions involving nitrogenous heteroarenes remain a challenging undertaking – coordination of Lewis basic atoms into metal centers often necessitate elevated temperature, high catalyst loading, etc. Herein, we report a sulfur (IV) mediated cross-coupling amendable for the efficient synthesis of heteroaromatic substrates. Addition of heteroaryl nucleophiles to a simple, readily-accessible alkyl sulfinyl (IV) chloride allows formation of a trigonal bipyramidal sulfurane intermediate. Reductive elimination therefrom provides bis-heteroaryl products in a practical and efficient fashion.
6-O-carbamate-11,12-lacto-ketolide antimicrobials
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, (2008/06/13)
6-O-Carbamate-11,12-lacto-ketolide antimicrobials of the formula: wherein R1, R2, R3 R7, and R8 are as described herein and in which the substituents have the meaning indicated in the description. These compounds are useful as antibacterial agents.
