Iodine-catalyzed efficient conjugate addition of pyrroles to α,β-unsaturated ketones
作者:Biswanath Das、Nikhil Chowdhury、Kongara Damodar
DOI:10.1016/j.tetlet.2007.02.094
日期:2007.4
Iodine was used as a catalyst for the conjugateaddition of pyrroles to α,β-unsaturated ketones at room temperature. Mono- and dialkylated products were obtained by using equimolar amounts of the reactants. However, the use of excess enones afforded only dialkylated products.
Conjugate addition of pyrroles to α,β-unsaturated ketones using copper bromide as a catalyst
作者:Radhika S. Kusurkar、Sandip K. Nayak、Neelam L. Chavan
DOI:10.1016/j.tetlet.2006.08.030
日期:2006.10
Copper bromide was used as a catalyst for the addition of pyrroles to enones. When both the reactants were used in equimolar amounts, mono and dialkylated products were obtained. However, the use of excess enone furnished only dialkylated products. Thus, copper bromide was shown to be an efficient catalyst for the dialkylation of pyrroles.
Aluminum chloride–catalyzed C-alkylation of pyrrole and indole with chalcone and bis-chalcone derivatives
作者:Meliha Burcu Gürdere、Oguz Özbek、Mustafa Ceylan
DOI:10.1080/00397911.2015.1136644
日期:2016.2.16
AlCl3-catalyzed alkylation of pyrrole (2) with chalcone (1a–i) at a ratio of 8:1 in the presence of 10 mol% AlCl3 gave the solely 2-alkyl pyrroles (3a–i) at room temperature for 12 in good yields. The same reaction was performed with pyrrole (2) and chalcone at a ratio of 1:3 in CH3CN at rt for 3 h to achieve 2,5-dialkyl pyrroles (4a–f). In addition, the reaction of the pyrrole (2) and indole (7) on 1,4-phenylene