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Your search keyword '"Butkevich, Alexey N."' showing total 7 results
Start Over Author "Butkevich, Alexey N." Journal organic letters
7 results on '"Butkevich, Alexey N."'

4. PONy Dyes: Direct Addition of P(III) Nucleophiles to Organic Fluorophores

Author

Butkevich, Alexey N., Sednev, Maksim V., Shojaei, Heydar, Belov, Vladimir N., and Hell, Stefan W.

Abstract

Nucleophilic addition of phosphinic acid, phosphites, sodium dialkyl phosphites, phosphoramidites, phosphinites, and phosphonites to highly polarized or cationic fluorophores, followed by oxidation, results in new “PONy” dyes with auxochromic phosphinate, phosphonate, or phosphonamidate groups. The reaction was applied to a wide variety of coumarins, (thio)pyronins, and N-alkylacridinium and 5,6-dihydrobenzo[c]xanthen-12-ium salts as well as a meso-chlorinated BODIPY to provide compact dyes with red-shifted absorption and emission bands and Stokes shifts up to 8200 cm–1.

Published
2024
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7. Two-Step One-Pot Synthesis of Benzoannulated Spiroacetals by Suzuki–Miyaura Coupling/Acid-Catalyzed Spiroacetalization.

Author

Butkevich, Alexey N., Corbu, Andrei, Meerpoel, Lieven, Stansfield, Ian, Angibaud, Patrick, Bonnet, Pascal, and Cossy, Janine

Subjects
*CHEMICAL synthesis, *SUZUKI reaction, *COUPLING reactions (Chemistry), *SPIRO compounds, *ANNULATION, *GLYCALS
Abstract

Substituted benzoannulated spiroacetals were prepared from (2-haloaryl)alkyl alcohols and dihydropyranyl or dihydrofuranyl pinacol boronates using a Suzuki–Miyaura coupling followed by an acid-catalyzed spirocyclization. Application of the reaction to a glycal boronate provides an approach to annulated spiroacetals in enantiopure form. [ABSTRACT FROM AUTHOR]

Published
2012
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