Total syntheses of the aromatase inhibitors, mammeasins C and D, from Thai medicinal plant Mammea siamensis
作者:Genzoh Tanabe、Nozomi Tsutsui、Kanae Shibatani、Shinsuke Marumoto、Fumihiro Ishikawa、Kiyofumi Ninomiya、Osamu Muraoka、Toshio Morikawa
DOI:10.1016/j.tet.2017.06.016
日期:2017.7
pyranocoumarins, mameasins C (1) and D (2), aromatase inhibitors isolated from the flowers of Mammea siamensis, were accomplished in five steps, starting from phloroglucinol 3. In this strategy, the characteristic pyran ring-fused coumarin core of 1 and 2 was effectively constructed by Friedel-Crafts acylation of 3, followed by Reformatsky reaction of the resultant ketone to give a key coumarin intermediate 9
所述geranylated pyranocoumarins的第一全合成,mameasins C(1)和d(2),芳香从的花中分离抑制剂黄果木属siamensis等,在五个步骤中完成,从间苯三酚开始3。在这种策略中,特征吡喃环稠合的香豆素芯1和2是由有效的Friedel-Crafts酰化构造3,然后将所得酮的Reformatsky反应,得到香豆素中间密钥9。通过连续C逐步将化合物9转化为目标1和2-酰化和O- Geranylation,然后是[1,3] -sigmatropic geranyl shift。此外,对通过合成途径到达1和2的中间体进行的筛选显示,与天然产物1和2相比,去Geranylated吡喃香豆素(10和11)显示出优异的芳香酶抑制活性。