作者: Massimo Fabris , Marco Noè , Alvise Perosa , Maurizio Selva , Roberto Ballini
DOI: 10.1021/JO202294K
关键词: Ionic liquid 、 Phosphonium 、 Bicarbonate 、 Chemistry 、 Nucleophile 、 Steric effects 、 Organic chemistry 、 Catalysis 、 Nitroaldol reaction
摘要: Phosphonium ionic liquids exchanged with bicarbonate and methylcarbonate anions (CILs) exhibit catalytic performances comparable to those of sterically hindered (non nucleophilic) organosuperbases such as DBU. At 25–50 °C, under solventless conditions, CILs efficiently catalyze the Henry addition different aldehydes ketones nitroalkanes: not only they allow selective formation nitroaldols but unlock a novel high-yielding access dinitromethyl derivatives ketones.