Synthesis of spiroindoline phytoalexin (S)-(−)-spirobrassinin and its unnatural (R)-(+)-enantiomer
作者:Mariana Budovská、Peter Kutschy、Tibor Kožár、Taťána Gondová、Ján Petrovaj
DOI:10.1016/j.tet.2012.11.067
日期:2013.1
The stereoselective syntheses of the cruciferous indole phytoalexin (S)-(−)-spirobrassinin and its unnatural (R)-(+)-enantiomer were achieved by bromine-induced spirocyclization of (−)- and (+)-1-(8-phenylmenthoxycarbonyl)brassinin in the presence of water to give the corresponding spirobrasinol derivatives, followed by oxidation to the derivatives of spirobrassinin and finally removal of the chiral
十字花科吲哚植物抗毒素(S)-(-)-spirobrassinin及其非天然(R)-(+)-对映异构体的立体选择性合成是通过溴诱导的(-)-和(+)-1-(8)螺环化而实现的-苯基薄荷基羰基)球蛋白在水的存在下得到相应的螺菌灵醇衍生物,然后氧化为螺丝球蛋白的衍生物,最后除去手性助剂。