Hispidospermidin, a novel phospholipase C inhibitor produced by Chaetosphaeronema hispidulum (Cda) Moesz NR 7127. II. Isolation, characterization and structural elucidation.
摘要:
Hispidospermidin(1)是由Chaetosphaeronema hispidulum(Cda)Moesz NR 7127产生的一种新型磷脂酶C抑制剂。基于多种NMR研究,包括1H-1H COSY、13C-1H COSY、HOHAHA、HMBC、COLOC以及长程J C-H分辨的2D光谱,其结构(C25H47N3O)已被阐明为一种具有三甲基精氨酸侧链的笼状化合物。通过修改过的Mosher方法,对1的衍生物的(R)和(S)-MTPA酰胺进行了绝对构型的阐明。
A spontaneous bicyclization facilitates a synthesis of (−)-hispidospermidin
作者:Junko Tamiya、Erik J Sorensen
DOI:10.1016/s0040-4020(03)00936-0
日期:2003.8
A concise, enantiospecific synthesis of the phospholipase C inhibitor (−)-hispidospermidin (1) has been achieved by approximating the architecture of a reactive intermediate that may lie on the biosynthetic pathway leading to this natural product. Two compounds derived from (R)-(+)-pulegone were joined by a highly diastereoselective carbonyl addition. A proximity-facilitated, acid-induced bicyclization