A [3 + 3] Annelation Approach to (+)-Rhopaloic Acid B
摘要:
A general and enantiospecific [3 + 3] reaction toward functionalized pyrans is reported that has been employed in the first enantioselective synthesis of (+)-rhopaloic acid B.
A [3 + 3] Annelation Approach to (+)-Rhopaloic Acid B
作者:Julien C. R. Brioche、Katharine M. Goodenough、David J. Whatrup、Joseph P. A. Harrity
DOI:10.1021/ol701553j
日期:2007.9.1
A general and enantiospecific [3 + 3] reaction toward functionalized pyrans is reported that has been employed in the first enantioselective synthesis of (+)-rhopaloic acid B.
Novel norsesterterpenes, which inhibit gastrulation of the starfish embryo, from the marine sponge Rhopaloeides sp.
Two new norsesterterpenes, rhopaloic acids B (2) and C (3), have been isolated from the marinesponge Rhopaloeides sp. together with the known rhopaloic acid A (1). Their structures have been elucidated by spectroscopic methods. Compounds1, 2, and3 potently inhibited gastrulation of the starfish (Asterina pectinifera) embryo, whereas hydrogenation or esterification resulted in loss of the inhibitory