作者:Patricia Y. Hayes、Sharon Chow、Fredrik Rahm、Paul V. Bernhardt、James J. De Voss、William Kitching
DOI:10.1021/jo101224w
日期:2010.10.1
liberated primary alcohol 79 was converted by standard procedures to key enediol 89 which, with the Pd(II) protocol, afforded the major separable plakortones 90 and 91, with the former being identical with natural plakortone C (3). Very mild hydrogenation of 90 afforded a saturated plakortone, identical with natural plakortone F (6), thus establishing its structure and absolute stereochemistry. Available
Plakortis属的加勒比海海绵,P 。halichondrioides,和P 。单已经提供了一系列的生物活性furanolactones-的plakortones A-d(的1 - 4)来自前海绵和B-F(2 - 6)从后者。吡咯烷酮的定义基序是空间上拥挤的2,6-二氧杂双环[3.3.0] octan-3-one部分,即呋喃内酯核心。钯(II)通过适当的烯-1,3-二醇介导的羟基环化-羰基化-内酯化级联可有效访问该核。杂色酮C(3)和F(6)的总合成。现在描述),其在该组次生代谢物中解决了组成和立体化学特征。收购plakortone D(4),最有效的SR-Ca 2+泵浦ATPase活化剂,利用立体定义的内酯核心,其由受保护的均烯丙基醇29的不对称二羟基化产生。然后将衍生的内酯醛与独立生成的砜活化的侧链单元57偶联。序列中作为被保护的立体定义的二醇携带的11,12- E-双键通过原酸酯