Catalyst-Controlled Chemoselective Reaction of 3-Indolylmethanols with Cyclic Enaminones Leading to C2-Functionalized Indoles
作者:Xin Li、Wei Tan、Yu-Xin Gong、Feng Shi
DOI:10.1021/jo502782b
日期:2015.2.6
A catalyst-controlledchemoselective formal 1,2-addition of 3-indolylmethanols with cyclic enaminones has been established in the presence of TfOH as a strong acid, which afforded C2-functionalized indole derivatives in generally good yields (up to 89% yield). This reaction not only confronted the great challenge in 1,2-addition of 3-indolylmethanols but also provided a good strategy for C2-functionalization
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
Organocatalytic Arylation of 3-Indolylmethanols via Chemo- and Regiospecific C6-Functionalization of Indoles
作者:Lu-Jia Zhou、Yu-Chen Zhang、Jia-Jia Zhao、Feng Shi、Shu-Jiang Tu
DOI:10.1021/jo501989x
日期:2014.11.7
An organocatalytic arylation of 3-indolylmethanols has been established via chemo- and regiospecific C6-functionalization of 2,3-disubstituted indoles, leading to the production of bisindolyloxindoles containing an all-carbon quaternary stereocenter in high yields (up to 99% yield). This reaction not only represents the first catalytic arylation of 3-indolylmethanols using 2,3-disubstituted indoles as aromatic nucleophiles but also serves as a good example of direct catalytic C6-functionalization of indoles, which have been scarcely investigated. Besides, this approach also provides an efficient method to access a biologically important 3,3'-disubstituted oxindole framework and a 3',6-linked bisindole skeleton. Furthermore, the investigation of the activation mode suggested that the dual activation of an ion pair and H-bond between the substrates and the catalyst cooperatively contributed to the success of the reaction.
Catalytic Asymmetric Aza-ene Reaction of 3-Indolylmethanols with Cyclic Enaminones: Enantioselective Approach to C3-Functionalized Indoles
作者:Wei Tan、Bai-Xiang Du、Xin Li、Xu Zhu、Feng Shi、Shu-Jiang Tu
DOI:10.1021/jo500644v
日期:2014.5.16
The catalytic asymmetric aza-ene reactions of 3-indolylmethanols with cyclic enaminones and the highly enantioselective aza-ene reactions utilizing cyclic aza-ene components have been established, which directly assemble isatin-derived 3-indolylmethanols and dimedone-derived enaminones into C3-functionalized chiral indoles with one all-carbon quaternary stereogenic center in high yields and excellent enantioselectivities (up to 99% yield, up to 95:5 er).
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