Enantioselective total synthesis and absolute stereostructure of hippospongic acid A
摘要:
A compound having the structure proposed for hippospongic acid A, a triterpene that specifically inhibits gastrulation of starfish embryos, was synthesized enantioselectively. The synthetic compound was not identical to the natural product. Comparison of the NMR spectra of the natural and synthetic compounds led us to propose an alternative structure, which was confirmed by enantioselective synthesis. The present synthesis established that the natural product has the (R)-configuration. (C) 2001 Elsevier Science Ltd. All rights reserved.
The structure of hippospongic acid A was reinvestigated and new evidence supporting the revised structure previously proposed was obtained. The structure, including absolute configuration, was established by the enantioselective synthesis.
A compound having the structure proposed for hippospongic acid A, a triterpene that specifically inhibits gastrulation of starfish embryos, was synthesized enantioselectively. The synthetic compound was not identical to the natural product. Comparison of the NMR spectra of the natural and synthetic compounds led us to propose an alternative structure, which was confirmed by enantioselective synthesis. The present synthesis established that the natural product has the (R)-configuration. (C) 2001 Elsevier Science Ltd. All rights reserved.
Enantioselective Synthesis of Reported Hippospongic Acid A
Total synthesis of hippospongic acid A, an inhibitor of gastrulation of starfish embryos, has been studied. A compound having the structure assigned to hippospongic acid A was synthesized enantioselectively. The spectral data of the synthetic compound were slightly different from those of the natural product and an alternative structure was proposed for the natural product.
对海星胚胎原肠胚形成抑制剂海马酸 A 的全合成进行了研究。对映选择性地合成了具有指定为海马酸A的结构的化合物。合成化合物的光谱数据与天然产物的光谱数据略有不同,并为天然产物提出了替代结构。