Enantioselective Synthesis of Furo[2,3-<i>b</i>]furans, a Spongiane Diterpenoid Substructure
作者:Roland Weisser、Weimin Yue、Oliver Reiser
DOI:10.1021/ol051457m
日期:2005.11.1
enantioselective synthesis of cis-fused 5-oxofuro[2,3-b]furans, being found in many spongiane diterpenoid natural products, is reported starting from inexpensive methyl 2-furoate. Moreover, the acid-catalyzed rearrangement of the furo[2,3-b]furan framework A to B is observed for some derivatives, suggesting a simple connection between natural products differing in the absolute configuration of the 3a,6a
[结构:见正文]据报道,在许多海绵状二萜类天然产物中发现了一种短而对映选择性的顺式融合的5-氧呋喃[2,3-b]呋喃的合成,它是从廉价的2-糠酸甲酯开始的。此外,对于某些衍生物,还观察到了呋喃[2,3-b]呋喃骨架A至B的酸催化重排,这表明天然产物之间的简单连接有所不同,即3a,6a环结的绝对构型不同。