Iodine-Catalyzed Highly Efficient Synthesis of 3-Alkylated/3-Alkenylated Indoles from 1,3-Dicarbonyl Compounds
作者:Krishna Singh、Neetu Singh
DOI:10.1055/s-0032-1316684
日期:2012.9
Molecular iodine has been found to be an efficient and inexpensive catalyst for the synthesis of 3-alkylated/3-alkenylated indoles in excellent yields by using different indoles and 1,3-dicarbonylcompounds at room temperature.
Synthesis of 3-alkenylated indole and <i>bis</i>(indol-3-yl) derivatives catalyzed by sulfonic acid-functionalized ionic liquid under ultrasound irradiation
作者:Saroj Budania、Ganesh M. Shelke、Anil Kumar
DOI:10.1080/00397911.2016.1278232
日期:2017.4.3
ABSTRACT A simple and efficient protocol has been developed for the synthesis of 3-alkenylated indoles and bis(indol-3-yl) derivatives by sulfonic acid-functionalized ionic liquid-catalyzed reaction of indole with 1,3-diketones/3-ketoesters under solvent-free ultrasound irradiation. Good to excellent yields (68–94%) are obtained in ultrasonication. The product of reaction is dependent on the substituent
heteroarenes such as pyrroles and indoles undergo addition reactions to C-C triplebonds in the presence of a catalytic amount of Pd(OAc)(2) under very mild conditions, affording cis-heteroarylalkenes in most cases. The cleavage of aromatic C-H bonds is the possible rate-determining step in CH(2)Cl(2), and the addition of heteroaromatic C-H bonds to C-C triplebonds is in a trans-fashion.