title: Ambient temperature synthesis of β,β'-fused nickel(II) pyrrolo[1,2-a]pyrazinoporphyrins via a DBSA-catalyzed Pictet-Spengler approach.
abstract: A facile first synthetic strategy to construct novel π-extended β,β'-fused nickel(II) pyrrolo[1,2-a]pyrazinoporphyrins has been developed via a Pictet-Spengler reaction of newly prepared nickel(II) 2-amino-3-(pyrrol-1-yl)-5,10,15,20-tetraphenylporphyrin with various aromatic, aliphatic or heterocyclic aldehydes in the presence of 10 mol% p-dodecylbenzenesulfonic acid (DBSA) as an efficient Brønsted acid catalyst in 1,4-dioxane at 25 °C. A variety of these π-extended porphyrin analogues were obtained in moderate to good yields under mild conditions and characterized on the basis of spectral data and single crystal X-ray analysis.
authors.affiliation: Department of Chemistry, University of Delhi, Delhi 110 007, India. mnath@chemistry.du.ac.in mnathchemistry@gmail.com.
authors.forename: Dileep Kumar
authors.initials: DK
authors.lastname: Singh
authors.forename: Mahendra
authors.initials: M
authors.lastname: Nath
mesh_terms: D001557:Benzenesulfonates / Q000737:chemistry*; D002384:Catalysis; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D011166:Porphyrins / Q000737:chemistry*; D011719:Pyrazines / Q000737:chemistry*; D013696:Temperature
chemical_list: D001557:Benzenesulfonates; D009942:Organometallic Compounds; D011166:Porphyrins; D011719:Pyrazines; C032365:benzenesulfonic acid; D009532:Nickel