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6 results on '"Sharanov, Illia"'

5. Atropselektive Silylierung von 1,1′‐Biaryl‐2,6‐diolen mittels chiraler gegenaniondirigierter Desymmetrisierung und anschließender Verbesserung durch kinetische Racematspaltung.

Author

Zhu, Min, Jiang, Hua‐Jie, Sharanov, Illia, Irran, Elisabeth, and Oestreich, Martin

Abstract

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Published
2023
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6. Chiral Carborane Acids Decorated with Binol-Based Phosphonates: Synthesis, Characterization, and Application

Author

Jiang, Hua-Jie, Zuo, Honghua, Zhu, Min, Sharanov, Illia, Irran, Elisabeth, Klare, Hendrik F. T., Tshepelevitsh, Sofja, Lõkov, Märt, Leito, Ivo, and Oestreich, Martin

Abstract

The syntheses of hexabrominated closo-carborates decorated with different chiral Binol-derived phosphonates and their conjugate acids are described. X-ray diffraction analysis reveals a polymeric structure for the sodium salt with the anionic units connected by [B–Br–Na–O═P]+linkages. For the acid, coordination of the proton to the phosphonate’s P═O oxygen atom is assumed. The pKavalue was estimated by combining experiments and computations. Application of these Brønsted acids as chiral catalysts in an imino-ene and a Mukaiyama–Mannich reaction was moderately successful.

Published
2023
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