Peez, Theodor; Schmalz, Veronika; Harms, Klaus; Koert, Ulrich published the artcile< Synthesis of Naphthocyclobutenes from α-Naphthyl Acrylates by Visible-Light Energy-Transfer Catalysis>, Category: pyridine-derivatives, the main research area is naphthocyclobutene stereoselective preparation; iridium photocatalyst stereoselective photocyclization naphthylacrylate; visible light energy transfer catalysis stereoselective photocyclization naphthylacrylate.
Me (α-naphthyl)acrylates bearing an ortho-substituent with a hydrogen atom such as I produce naphthocyclobutenes such as II by photocyclization in the presence of the iridium photocatalyst Ir(Fppy)3 under blue LED irradiation This reaction can be described as a carbon analog of the Norrish-Yang reaction; upon triplet excitation of the acrylate, 1,5-hydrogen atom transfer occurs to form a 1,4-diradical which cyclizes to form a cyclobuta-fused arene. In five of six cases where stereoselectivity was possible, the products were formed with diastereoselectivities up to >20:1.
Organic Letters published new progress about Cyclization catalysts, stereoselective (photo-). 370878-69-6 belongs to class pyridine-derivatives, and the molecular formula is C33H21F3IrN3, Category: pyridine-derivatives.