Ionic liquid triethylamine-bonded sulfonic acid {[Et3N–SO3H]Cl} as a novel, highly efficient and homogeneous catalyst for the synthesis of β-acetamido ketones, 1,8-dioxo-octahydroxanthenes and 14-aryl-14H-dibenzo[a,j]xanthenes
the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes from β-naphthol (2 equiv.) and aldehydes (1 equiv.) in harsh conditions (120 °C) in the absence of solvent. High yields, relatively short reaction times, efficiency, generality, clean process, simple methodology, low cost, easy work-up, ease of preparation and regeneration of the catalyst and green conditions (in the synthesis of the xanthene derivatives)
作者:MOHAMMAD ALI ZOLFIGOL、ARDESHIR KHAZAEI、ABDOLKARIM ZARE、MOHAMMAD MOKHLESI、TAHEREH HEKMAT-ZADEH、ALIREZA HASANINEJAD、FATEMEH DERAKHSHAN-PANAH、AHMAD REZA MOOSAVI-ZARE、HASSAN KEYPOUR、AHMAD ALI DEHGHANI-FIROUZABADI、MARIA MERAJODDIN
DOI:10.1007/s12039-011-0210-4
日期:2012.3
glycol-6000 (PEG-OSO3H) efficiently catalysed one-pot multi-component condensation of enolizable ketones or alkyl acetoacetates with arylaldehydes, acetonitrile and acetyl chloride to afford the corresponding β-acetamido ketone or ester derivatives in high to excellent yields and in relatively short reaction times. Moreover, in this work, some novel β-acetamido carbonylcompounds (i.e., one complex structure)
Pyrazinium Di(hydrogen sulfate) as a Novel, Highly Efficient and Homogeneous Catalyst for the Condensation of Enolizable Ketones with Aldehydes, Acetonitrile and Acetyl Chloride
作者:Ardeshir Khazaei、Mohammad Ali Zolfigol、Mohammad Mokhlesi、Abdolkarim Zare、Fatemeh Derakhshan-Panah、Maria Merajoddin、Hassan Keypour、Ahmad Ali Dehghani-Firouzabadi
DOI:10.1002/jccs.201100383
日期:2012.2
the synthesis of β‐acetamido ketone or ester derivatives in the presence of pyrazinium di(hydrogen sulfate) Py(OSO3H)2} as a novel, green and homogeneous solid acid catalyst at room temperature is described. One‐pot multi‐component condensation of enolizable ketones or alkyl acetoacetates with aldehydes, acetonitrile and acetyl chloride affords the title compounds in high to excellent yields and in