Isolation and Synthesis of (−)-(5<i>S</i>)-2-Imino-1-methylpyrrolidine-5- carboxylic Acid from <i>Cliona </i><i>t</i><i>enuis</i>: Structure Revision of Pyrostatins
作者:Leonardo Castellanos、Carmenza Duque、Sven Zea、Alfonso Espada、Jaime Rodríguez、Carlos Jiménez
DOI:10.1021/ol062087k
日期:2006.10.1
text] (-)-(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
[反应:请参见文本](-)-(5S)-2-亚氨基-1-甲基吡咯烷-5-羧酸(1),先前被报道为N-乙酰基-β-d-氨基葡萄糖苷酶抑制剂pyrostatin B,现已被分离出来。从挖洞的海绵Cliona tenuis的有机提取物中提取。1的结构,包括其绝对的立体化学,通过其光谱数据和化学转化进行表征,并通过全合成得到证实。1的合成表明,pyostatin B的结构分配有误。NMR光谱数据的比较有力地表明,pyrostatins A和B分别与5-hydroxyectoine和ectoine相同。