Total Synthesis of (+)-Phenguignardic Acid, a Phytotoxic Metabolite of<i>Guignardia bidwellii</i>
作者:Alexander Stoye、Danuta Kowalczyk、Till Opatz
DOI:10.1002/ejoc.201300531
日期:2013.9
(+)-Phenguignardic acid, a phytotoxic metabolite of the grape black rot fungus Guignardia bidwellii was synthesized, as well as its enantiomer, in eight steps from (R)-phenyllactic acid and 3-phenylprop-2-yn-1-ol. The formation of the carboxylate at a late stage, to avoid enolization of the precursor used in the central acetalization step, proved to be crucial. The synthesis of the natural product
(+)-Phenguignardic acid 是葡萄黑腐菌 Guignardia bidwellii 的一种植物毒性代谢物,以及它的对映异构体,由 (R)-苯基乳酸和 3-phenylprop-2-yn-1-ol 分八步合成。在后期形成羧酸盐,以避免在中央缩醛化步骤中使用的前体的烯醇化,被证明是至关重要的。天然产物的合成允许对其迄今为止未知的绝对构型进行明确分配。