Abstract Extraction of the seeds of Milletia thonningii gave alpinumisoflavone, its monomethyl and dimethyl derivatives, robustic acid and a new pyrano-isoflavone. The structure of the latter was established by chemical transformation and spectroscopic means.
esters 2 and 3 and decarboxylation of the acids 4 and 5, gave dihydro-4T-0-methyl alpinumisoflavone 6 and 4'-0-methylderrone 7 respectively. Similarly 8 gave 11 which was selectively demthylated to 7. DDQ; dehydrogenation of 6, 7 and 11 gave 14, 15 and 17. Demethylation of 6 and 7 followed by dehydrogenation gave alpinum isofavone 18 and derrone 19.
苯甲酰基色喃1与乙氧基氯在吡啶中反应,然后水解所得的酯2和3,酸4和5脱羧,分别得到二氢-4 T -0-甲基al异黄酮6和4'-0-甲基derrone。类似地,8得到11,其被选择性地脱甲基化为7。6、7和11的脱氢得到14、15和17。6和7的脱甲基,然后脱氢得到阿尔卑斯异黄酮18和derrone 19。
Isoflavones from Lupinus angustifolius root
作者:Geoffrey A. Lane、Roger H. Newman
DOI:10.1016/s0031-9422(00)81531-9
日期:1986.12
Abstract Two novel isoflavones, 5,7,2′-trihydroxy-6-(3,3-dimethylallyl)-[6″,6″-dimethylpyrano(2″,3″:4′,3′) ]-isoflavone and 5,2′,4′-trihydroxy-3′-(3,3-dimethylallyl)-[6″,6″-dimethylpyrano(2″,3″:7,6)]isoflavone, have been isolated from the roots of Lupinus angustifolius cv. Uniharvest. Structures were established by analysis of 13 C NMR and other spectral data, and by chemical conversion of one of the
摘要 两种新型异黄酮,5,7,2'-三羟基-6-(3,3-二甲基烯丙基)-[6",6"-二甲基吡喃(2",3":4',3')]-异黄酮和5 ,2',4'-三羟基-3'-(3,3-二甲基烯丙基)-[6",6"-二甲基吡喃(2",3":7,6)]异黄酮,已从羽扇豆的根中分离出来狭叶 联合收割机。通过分析 13 C NMR 和其他光谱数据,以及通过将其中一种化合物化学转化为香豆素色酮来确定结构。
IYER, P. R.;RUKMANI, IYER C. S., J. NATUR. PROD., 52,(1989) N, C. 711-715
作者:IYER, P. R.、RUKMANI, IYER C. S.
DOI:——
日期:——
RAO, K. S. R. MOHAN;IYER, C. S. HUKMANI;IYER, P. R., TETRAHEDRON, 43,(1987) N 13, 3015-3019
作者:RAO, K. S. R. MOHAN、IYER, C. S. HUKMANI、IYER, P. R.