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.