A Regioselective Lithiation of 1-Methoxymethoxyindole at the 2-Position and Its Application for the Synthesis of 2-Substituted Indoles
摘要:
A regioselective lithiation of 1-methoxymethoxyindole at the 2-position was achieved with n-BuLi at 0-degrees-C. Subsequent treatment with electrophiles afforded 2-substituted 1-methoxymethoxyindoles, which were readily converted to 2-substituted indoles.
Regio‐ and Enantioselective (3+3) Cycloaddition of Nitrones with 2‐Indolylmethanols Enabled by Cooperative Organocatalysis
作者:Tian‐Zhen Li、Si‐Jia Liu、Yu‐Wen Sun、Shuang Deng、Wei Tan、Yinchun Jiao、Yu‐Chen Zhang、Feng Shi
DOI:10.1002/anie.202011267
日期:2021.2
regiospecificity. This approach enabled not only the first organocatalytic asymmetric (3+3) cycloaddition of nitrones but also the first C3‐nucleophilic asymmetric (3+3) cycloaddition of 2‐indolylmethanols. More importantly, theoretical calculations elucidated the role of the cocatalyst HFIP in helping CPA control the reactivity and enantioselectivity of the reaction, demonstrating a new mode of cooperative catalysis
A sustainable and regioselective synthesis of highly functionalized indole-based sulfides from thiols and 2-indolymethanols is described. Notably, this reaction can be performed in the presence of 5 mol% In(OTf)3 under aqueous micellar conditions using an inexpensive surfactant DBSA. This protocol offers several advantages including excellent regioselectivities, being organic solvent-free, ease of
Design and Enantioselective Construction of Axially Chiral Naphthyl-Indole Skeletons
作者:Hong-Hao Zhang、Cong-Shuai Wang、Can Li、Guang-Jian Mei、Yuxue Li、Feng Shi
DOI:10.1002/anie.201608150
日期:2017.1.2
The firstenantioselective construction of a new class of axially chiral naphthyl‐indole skeletons has been established by organocatalyticasymmetric coupling reactions of 2‐naphthols with 2‐indolylmethanols (up to 99 % yield, 97:3 e.r.). This approach not only affords a new type of axially chiral heterobiaryl backbone, but also provides a new catalyticenantioselective strategy for constructing axially