作者:Alan R. Katritzky、Stanislaw Rachwal、Gregory J. Hitchings
DOI:10.1016/s0040-4020(01)87080-0
日期:1991.1
eliminated to form products of type Bt-CHR-NR′R″. The latter are versatile intermediates for the preparation of primary, secondary, and tertiary amines and in the alkylation of hydroxylamines, hydrazines, amides, thioamides, and sulfonamides. Polyfunctional amines and other polyfunctional compounds can also be prepared, and they enable significant extending of Mannich reaction.
<i>C</i>-Methylenation of anilines and indoles with CO<sub>2</sub> and hydrosilane using a pentanuclear zinc complex catalyst
作者:Kazuto Takaishi、Hiroyasu Kosugi、Ritsuki Nishimura、Yuya Yamada、Tadashi Ema
DOI:10.1039/d1cc03675k
日期:——
The one-step C-methylenation of anilines and indoles with CO2 and phenylsilane was catalyzed by a pentanuclear ZnII complex to give diarylmethanes via geminal C–H and C–C bond formation. It is proposed that the zinc–hydride complex generated in situ is a catalytically active species and that bis(silyl)acetal is a key intermediate. When aniline was used as a substrate, both the C-methylenation and N-methylation
Metal and acid-free visible light-induced Friedel-Crafts C3-alkylation reactions of indolederivatives were developed using N,N-dimethylanilines as the carbon source. A cheap and readily available organic dye, Rose Bengal, was applied as the photocatalyst. This environmentally friendly transformation afforded C3-alkylated indoles in moderate to good yields under mild conditions.
Ruthenium-Catalyzed Alkylation of Indoles with Tertiary Amines by Oxidation of a sp<sup>3</sup>CH Bond and Lewis Acid Catalysis
作者:Ming-Zhong Wang、Cong-Ying Zhou、Man-Kin Wong、Chi-Ming Che
DOI:10.1002/chem.200902387
日期:2010.5.17
catalysts for directC‐3 alkylation of indoles, giving the desired products in high yields (up to 82 % based on 60–95 % substrate conversions). These ruthenium compounds catalyze oxidative couplingreactions of a wide variety of anilines and indoles bearing electron‐withdrawing or electron‐donating substituents with high regioselectivity when using tBuOOH as an oxidant, resulting in the alkylation of N‐arylindoles
A novel multi-component reaction of indole, formaldehyde, and tertiary aromatic amines
作者:Atul Kumar、Siddharth Sharma、Ram Awatar Maurya
DOI:10.1016/j.tetlet.2009.08.046
日期:2009.10
A novel multi-component reaction of indoles, formaldehydes, and tertiary aromatic amines is described for the synthesis of dialkylaminoarylated indoles using silica-supported perchloric acid (HClO4–SiO2) as an inexpensive and highly efficient catalyst. The key features of this multi-component reactions are operational simplicity, mild reaction conditions, regioselectivity, and recycling of catalyst