Stereoselective Synthesis of the Antiprotozoal Lactone Passifloricin A and Seven Isomers Thereof
作者:Juan Murga、Jorge García-Fortanet、Miguel Carda、J. Alberto Marco
DOI:10.1021/jo049275d
日期:2004.10.1
The conjugated δ-lactone passifloricin A, a natural product with antiprotozoal activity, and seven isomers thereof have been synthesized in enantiopure form. It has been shown in this way that the proposed structure for the natural compound was erroneous. The correct structure is now evidenced. Key steps of the syntheses were asymmetric Brown-type aldehyde allylations and ring-closing metatheses.
具有对原生动物活性的天然产物共轭的δ-内酯西番莲菌素A及其七个异构体以对映体纯的形式合成。已经表明以这种方式提出的天然化合物的结构是错误的。现在证明了正确的结构。合成的关键步骤是不对称的布朗型醛烯丙基化和闭环复分解。