Organocatalytic enantioselective and (Z)-selective allylation of 3-indolylmethanol via hydrogen-bond activation
作者:Yan Liu、Hong-Hao Zhang、Yu-Chen Zhang、Yan Jiang、Feng Shi、Shu-Jiang Tu
DOI:10.1039/c4cc02056a
日期:——
asymmetric allylation of 3-indolylmethanol has been established via hydrogen-bond activating mode, which directly assembles isatin-derived 3-indolylmethanols and o-hydroxystyrenes into chiral allyl-substituted oxindoles with one all-carbon quaternarystereogeniccenter and one newly formed C=Cbond in excellent enantioselectivity and (Z)-selectivity (up to 97% ee, >20 : 1 Z/E ratio). This transformation provides
已通过氢键活化模式建立了3-吲哚甲醇的有机催化不对称烯丙基化反应,该方法直接将由靛红衍生的3-吲哚甲醇和邻羟基苯乙烯组装成具有一个全碳季立体中心和一个新形成的C的手性烯丙基取代的羟吲哚。 = C键具有出色的对映选择性和(Z)选择性(高达97%ee,> 20:1 Z / E比)。这种转化为吲哚的不对称C3官能化和3-吲哚基甲醇的烯丙基化提供了一个有效的策略,并且可以精确控制CC和C = C键形成中的立体选择性。
Catalytic Asymmetric Formal [3+3] Cycloaddition of an Azomethine Ylide with 3-Indolylmethanol: Enantioselective Construction of a Six-Membered Piperidine Framework
作者:Feng Shi、Ren-Yi Zhu、Wei Dai、Cong-Shuai Wang、Shu-Jiang Tu
DOI:10.1002/chem.201304187
日期:2014.2.24
catalytic asymmetricformal [3+3] cycloaddition of 3‐indolylmethanol and an in situ‐generated azomethine ylide has been established to construct a chiral six‐membered piperidine framework with two stereogenic centers. This approach not only represents the first enantioselective cycloaddition of isatin‐derived 3‐indolylmethanol, but also has realized an unusual enantioselective formal [3+3] cycloaddition
Catalytic Asymmetric Cascade Dearomatization of Tryptamines with Indol-3-ylmethanols: Diastereo- and Enantioselective Synthesis of Structurally Complex Indole Derivatives
A chiral phosphoric acid-catalyzed asymmetric cascade dearomatization reaction of tryptamines with indol-3-ylmethanols has been established. This not only realized the first catalytic asymmetric cascade substitution of indol-3-ylmethanols, but also provided an efficient and stereoselective method (99% yield, >95:5 dr, 95:5 er) for constructing complex pyrroloindoline-based skeletons with three contiguous