Stereochemistry of strictic acid and related furano-diterpenes from conyza japonica and grangea maderaspatana
作者:Umesh C. Pandey、Ashok K. Singhal、Nabin C. Barua、R.P. Sharma、Jogendra N. Baruah、Kinzo Watanabe、Palaniappan Kulanthaivel、Werner Herz
DOI:10.1016/s0031-9422(00)80338-6
日期:1984.1
gave strictic acid, ent-2β-hydroxy-15,16-epoxy-3,13(16),14-clerodatrien-18-oic acid and 5,7-dihydroxy-3,8,4′-trimethoxyflavone. Extraction of Grangea maderaspatana gave (-)-hardwickiic acid, ent-15,16-epoxy-1,3,13(16),14-clerodatetraen-18-oic acid and 3-hydroxy-8-acetoxypentadeca-1,9,14-trien-4,6-diyne. The structure of ent-2β-hydroxy-15,16-epoxy-3,13(16),14-cleroclatrien-18-oic acid was deduced by
摘要 Conyza japonica 的提取得到了严格酸、ent-2β-hydroxy-15,16-epoxy-3,13(16),14-clerodatrien-18-oic acid 和 5,7-dihydroxy-3,8,4'-三甲氧基黄酮。提取 Grangea maderaspatana 得到 (-)-hardwickiic 酸、ent-15,16-epoxy-1,3,13(16),14-clerodatetraen-18-oic acid 和 3-hydroxy-8-acetoxypentadeca-1,9, 14-trien-4,6-二炔。ent-2β-hydroxy-15,16-epoxy-3,13(16),14-cleroclatrien-18-oic acid 的结构是通过光谱法和 (-)-hardwickiic 酸的部分合成和立体化学推导出来的。通过与 ent-2β-hydroxy-15