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1 article(s) from Sakamoto, Masami

Asymmetric synthesis of β-amino cyanoesters with contiguous tetrasubstituted carbon centers by halogen-bonding catalysis with chiral halonium salt

Yasushi Yoshida,
Maho Aono,
Takashi Mino and
Masami Sakamoto

Beilstein J. Org. Chem. 2025, 21, 547–555, doi:10.3762/bjoc.21.43

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Figure 1: Selected examples and applications of chiral halogen-bonding catalysts.

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Figure 2: Selected examples for the construction of contiguous tetrasubstituted carbon centers via the Mannic...

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Scheme 1: Catalyst screening for the asymmetric Mannich reaction. All yields were determined by ¹H NMR spectr...

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Scheme 2: N-Protecting group optimization for the asymmetric Mannich reaction. All yields were determined by ¹...

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Scheme 3: Catalyst screening using 7b as a substrate. All yields were determined by ¹H NMR spectroscopy using...

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Scheme 4: Substrate scope for the asymmetric Mannich reaction using 0.06 mmol of 7. Isolated product yields a...

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Figure 3: Plausible reaction mechanism.

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Letter

Published 12 Mar 2025

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