title: Efficient PPA-SiO2-catalyzed synthesis of β-enaminones under solvent-free conditions.
abstract: An efficient method has been developed for the synthesis of β-enaminones under solvent-free reaction conditions using PPA-SiO2 as catalyst. The reaction yields were good to excellent (up to 90%). This methodology affords high selectivity and good tolerance of a variety of different functional groups present on both aromatic and aliphatic amines. In addition, the methodology is environmentally benign and cost-effective due to absence of solvent and easy work-up.
authors: Institute of Chemical Sciences, University of Peshawar, Peshawar-25120, Pakistan. akhund54@gmail.com.
authors: Muhammad
authors: M
authors: Nisar
authors: Ihsan
authors: I
authors: Ali
authors: Muhammad Raza
authors: MR
authors: Shah
authors: Institute of Chemical Sciences, University of Peshawar, Peshawar-25120, Pakistan. dr.mughalqayum@kust.edu.pk.
authors: Mughal
authors: M
authors: Qayum
authors: Muhammad
authors: M
authors: Zia-Ul-Haq
authors: Institute of Chemical Sciences, University of Peshawar, Peshawar-25120, Pakistan. umer.rashid@yahoo.com.
authors: Umer
authors: U
authors: Rashid
authors: Md Saiful
authors: MS
authors: Islam
mesh_terms: D000588:Amines / Q000138:chemical synthesis*; D002384:Catalysis; D010756:Phosphoric Acids / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D012997:Solvents
chemical_list: D000588:Amines; D010756:Phosphoric Acids; D011108:Polymers; D012997:Solvents; D012822:Silicon Dioxide; C047269:polyphosphoric acid