Synthesis 2007(16): 2471-2480  
DOI: 10.1055/s-2007-983785
PAPER
© Georg Thieme Verlag Stuttgart · New York

Synthesis of (-)-Tabtoxinine-β-lactam, the Phytotoxin of Tobacco Wildfire Disease

Hiromasa Kiyota*, Takafumi Takai, Yasuharu Shimasaki, Masatoshi Saitoh, Osamu Nakayama, Tomoko Takada, Shigefumi Kuwahara
Department of Applied Bioorganic Chemistry, Division of Bioscience & Biotechnology for Future Bioindustry, Graduate School of Agricultural Science, Tohoku University, 1-1 Tsutsumidori-Amamiya, Aoba-ku, Sendai 981-8555, Japan
Fax: +81(22)7178785; e-Mail: kiyota@biochem.tohoku.ac.jp;
Further Information

Publication History

Received 5 March 2007
Publication Date:
12 July 2007 (online)

Abstract

Synthesis of (-)-tabtoxinine-β-lactam and its (3R)-isomer, the cause of tobacco wildfire disease, was achieved from l-serine using a zinc-mediated coupling reaction, Sharpless asymmetric dihydroxylation and lactamization of β-mesyloxy benzylhydroxamate amide as the key steps.

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This compound (12c) was prepared by bromination of the corresponding known alcohol. [19b]

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(+)-(3R)-1 epimerized to epi-tabtoxinine-δ-lactam (epi-6) after being stored at 0 °C. 1H NMR (D2O, 300 MHz): δ = 1.73-2.11 (4 H, m), 3.13 (1 H, d, J = 13.2 Hz), 3.35 (1 H, d, J = 13.2 Hz), 3.85 (1 H, m); 13C NMR (D2O, 150 MHz): δ = 25.13, 32.62, 46.31, 53.84, 75.36, 176.86.