Volume 127, Issue 21 pp. 6334-6338
Zuschrift

Direct Catalytic Asymmetric Aldol Reaction of an α-Azido Amide

Dr. Karin Weidner

Dr. Karin Weidner

Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021 (Japan)

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Zhongdong Sun

Zhongdong Sun

Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021 (Japan)

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Dr. Naoya Kumagai

Corresponding Author

Dr. Naoya Kumagai

Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021 (Japan)

Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021 (Japan)Search for more papers by this author
Prof. Dr. Masakatsu Shibasaki

Corresponding Author

Prof. Dr. Masakatsu Shibasaki

Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021 (Japan)

JST, ACT-C, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021 (Japan)

Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021 (Japan)Search for more papers by this author
First published: 30 March 2015
Citations: 23

This work was financially supported by JST, ACT-C, and KAKENHI (25713002) from JSPS. Dr. Ryuichi Sawa and Yumiko Kubota are gratefully acknowledged for 15N NMR analysis. We thank Dr. Tomoyuki Kimura for assistance with X-ray crystallography. Dr. Fernando A. Arteaga is acknowledged for studies on aliphatic aldehydes.

Abstract

A direct aldol reaction of an α-azido 7-azaindolinylamide, promoted by a Cu-based cooperative catalyst, is documented. Aromatic aldehydes bearing an ortho substituent exhibited diastereodivergency depending on the nature of the chiral ligands used. Smooth reactions with ynals highlighted the broad substrate scope. A vicinal azido alcohol unit in the product allowed direct access to the corresponding aziridine and facile hydrolysis of the 7-azaindolinylamide moiety furnished enantioenriched β-hydroxy-α-azido carboxylic acid derivatives.

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