Catalyzed Asymmetric DielsAlder Reactions of Benzoquinone. Total Synthesis of (−)-Ibogamine
作者:James D. White、Younggi Choi
DOI:10.1002/hlca.200290014
日期:2002.12
yield and in high enantiomer excess. A model is proposed to explain the observed absolute configuration of cycloadducts, and the reaction is used as the key step in an asymmetric synthesis leading to the alkaloid (−)-ibogamine.
Mikami [[(S)-binol(2-))Cl 2 ]络合物(binol = [1,1'-binaphthalene] -2 )催化1,4-苯醌与1,3-二烯的DielsAlder反应,2′-二醇)以高收率和高对映体过量得到环加合物。提出了一个模型来解释所观察到的环加合物的绝对构型,并将该反应用作导致生物碱(-)-ibogamine的不对称合成中的关键步骤。