Structure–activity relationship studies on acremomannolipin A, the potent calcium signal modulator with a novel glycolipid structure 4: Role of acyl side chains on d-mannose
作者:Nozomi Tsutsui、Genzoh Tanabe、Nami Ikeda、Saika Okamura、Marika Ogawa、Kuniko Miyazaki、Ayako Kita、Reiko Sugiura、Osamu Muraoka
DOI:10.1016/j.ejmech.2016.05.034
日期:2016.10
1, whereas a heptanoyl homolog (2w: C7) maintained activity nearly equal to that of 1. When the acyl groups at these three positions were substituted by an octanoyl group (2i: C8), the activity was completely lost. On the other hand, of the 10 homologs in which the octanoyl at C-2 was substituted by other acyloxy moieties (2j–2s), three (2m: C7, 2n: C9, 2o: C10) maintained potent activity. These results
作为正在进行的关于acremomannolipin A(1)的结构与活性关系的研究的一部分,Acremomannolipin A(1)是从严格的Acremoniumstrictum中分离出来的新型糖脂,具有强大的钙信号调节活性,研究了酰基取代基对d-甘露糖部分的作用。通过适当保护的甘露糖基亚砜(3)与d-甘露醇衍生物(4)的立体选择性β-甘露糖基化反应,合成了三个带有不同酰氧基侧链的部分脱酰的同系物(2a - 2c)和20个同系物(2d - 2w)。),并检查了它们的钙信号调节活性。2a – 2c的活动完全丢失。在C-3,C-4和C-6位置(2t - 2v)带有相对短的酰氧基的同系物显示的活性低于1,而庚酰基同系物(2w:C 7)保持的活性几乎等于1。当这三个位置的酰基被辛酰基(2i:C 8)取代时,活性完全丧失。另一方面,在10个同系物中,C-2处的辛酰基被其他酰氧基部分(2j –2S),三(2米:C