Enantioselective Synthesis of Indoloquinolizidines via Asymmetric Catalytic Hydrogenation/Lactamization of Imino Diesters
作者:Yong Liu、Qun Wang、Ying Zhang、Jianbiao Huang、Linlin Nie、Jie Chen、Weiguo Cao、Xiaoyu Wu
DOI:10.1021/jo4020547
日期:2013.12.6
We have developed a highly efficient cascade sequence for asymmetric synthesis of indoloquinolizidines with absolute control of cis-H2/H12b relative geometry in good to excellent yields and excellent enantioselectivities. This cascade was triggered by the Ru(II)–TsDPEN-catalyzed asymmetric transfer hydrogenation of imino diesters, with subsequent spontaneous lactamization with discrimination between
我们已经开发了一种高效的级联序列,用于吲哚并喹喔啉的不对称合成,具有对顺式-H2 / H12b相对几何形状的绝对控制,具有良好的产率和优异的对映选择性。该级联反应是由Ru(II)–TsDPEN催化的亚氨基二酯的不对称转移氢化作用,随后是自发的内酰胺化作用,在两个非对映异构的2-烷氧基-2-氧代乙基之间存在区别。该策略的合成效用通过二氢双氧萘酚,Geissoschizol和isogeissoschizol的不对称制备得到证明。