A Facile Synthesis of Natural Products Chaetomellic Acid A and 1,7(<i>Z</i>)- Nonadecadiene-2,3-dicarboxylic Acid<sup>,</sup>
作者:Anirban Kar、Narshinha P. Argade
DOI:10.1021/jo020195o
日期:2002.10.1
Synthesis of recently isolated bioactive natural products chaetomellic acid A anhydride (1) and a novel 1,7(Z)-nonadecadiene-2,3-dicarboxylic acid (2) have been described. Chemoselective carbon[bond]carbon S(N)2' coupling reactions of appropriate Grignard reagents with dimethyl bromomethylfumarate (7) in diethyl ether in the presence of HMPA at room temperature furnished the corresponding diesters
最近分离出的具有生物活性的天然产物Chaetomellic acid的合成已描述了酸酐(1)和新型1,7(Z)-壬二烯-2,3-二羧酸(2)。在室温下,在HMPA存在下,适当的格氏试剂与溴代富马酸二甲酯(7)在乙醚中的化学选择性碳(碳)S(N)2'偶联反应在60-62%的收率下提供了相应的二酯8和15。水解形成的二酯8和15分别以定量产率得到相应的所需二酸9和2。乙酸酐诱导的二元酸9和2的闭环反应在五个步骤中分别获得了壳蜜三酸A酸酐(1)和异苯乙二酸B酸酐(16),总收率为38-39%。