Isolation and synthesis of (-)-(5S)-2-imino-1-methylpyrrolidine-5-carboxylic acid from Cliona tenuis:: Structure revision of pyrostatins

被引:26
作者
Castellanos, Leonardo [1 ]
Duque, Carmenza
Zea, Sven
Espada, Alfonso
Rodriguez, Jaime
Jimenez, Carlos
机构
[1] Univ Nacl Colombia, Dept Quim, Bogota 14490, Colombia
[2] Univ Nacl Colombia, Dept Biol, INVEMAR, Santa Maria 1016, Colombia
[3] Univ Nacl Colombia, Ctr Estudios Ciencias Mar, INVEMAR, Santa Maria 1016, Colombia
[4] Lilly SA, Analyt Technol DCR&T Alcobendas, Alcobendas 28108, Madrid, Spain
[5] Univ A Coruna, Dept Quim Fundamental, Fac Ciencias, E-15071 La Coruna, Spain
关键词
D O I
10.1021/ol062087k
中图分类号
O62 [有机化学];
学科分类号
070303 [有机化学]; 081704 [应用化学];
摘要
(-)-(5S)-2-Imino-1-methylpyrrolidine-5-carboxylic acid (1), previously reported as the N-acetyl-beta-D-glucosaminidase inhibitor pyrostatin B, has been isolated from the organic extracts of the burrowing sponge Cliona tenuis. The structure of 1, including its absolute stereochemistry, was characterized from its spectral data and chemical transformations and confirmed by total synthesis. The synthesis of 1 reveals that the structure of pyrostatin B has been incorrectly assigned. Comparison of NMR spectral data strongly suggests that pyrostatins A and B are identical to 5-hydroxyectoine and ectoine, respectively.
引用
收藏
页码:4967 / 4970
页数:4
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