Volume 52, Issue 30 pp. 7845-7849
Communication

Carbonylation of Propargyl Carbamates with Palladium(II) Bisoxazoline Catalysts: Efficient Synthesis of 5-Methoxy-3(2H)-furanones

Dr. Taichi Kusakabe

Dr. Taichi Kusakabe

Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510 (Japan)

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Takeo Takahashi

Takeo Takahashi

Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510 (Japan)

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Rong Shen

Rong Shen

Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510 (Japan)

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Ayumi Ikeda

Ayumi Ikeda

Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510 (Japan)

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Yogesh Daulat Dhage

Yogesh Daulat Dhage

The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047 (Japan)

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Dr. Yuichro Kanno

Dr. Yuichro Kanno

Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510 (Japan)

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Prof. Dr. Yoshio Inouye

Prof. Dr. Yoshio Inouye

Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510 (Japan)

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Prof. Dr. Hiroaki Sasai

Prof. Dr. Hiroaki Sasai

The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047 (Japan)

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Prof. Dr. Tomoyuki Mochida

Prof. Dr. Tomoyuki Mochida

Department of Chemistry, Faculty of Sciences, Kobe University, Rokkodai, Nada, Kobe 657-8501 (Japan)

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Prof. Dr. Keisuke Kato

Corresponding Author

Prof. Dr. Keisuke Kato

Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510 (Japan)

Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510 (Japan)Search for more papers by this author
First published: 20 June 2013
Citations: 30

This work was supported by a Grant-in-Aid for Scientific Research (C) (No. 24590026).

Graphical Abstract

Palladium and CO: Carbonylation of 1 with [Pd(tfa)2(±)-L1] (tfa=trifluoroacetate) affords the spirofuranone 2 with inversion of the stereochemistry at C17 in 96 % yield. C17-epi-1 also gave the same product 2 with retention of the stereochemistry at C17. Labelling studies show that 13CO was incorporated into the C5′ position of the furanone ring. The first asymmetric version of this new reaction was achieved.

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