by a chiral phosphoric acid. Starting from readily available tryptamine, both Michael products and amination products were obtained in high yields and enantioselectivities. The significance of this study was further demonstrated by the total synthesis of (−)‐debromoflustramine B.
有用的酸:通过手性
磷酸的催化作用,可以实现与相邻的季碳和叔碳中心形成
吡咯并二氢
吲哚的不对称反应。从易于获得的
色胺开始,迈克尔产品和胺化产品均以高收率和对映选择性获得。(-)-去
溴氟stramine B的全合成进一步证明了这项研究的重要性。