title: DABCO-catalyzed regioselective cyclization reactions of β,γ-unsaturated α-ketophosphonates or β,γ-unsaturated α-ketoesters with allenic esters.
abstract: Highly efficient DABCO-catalyzed [4 + 2] cycloaddition of β,γ-unsaturated α-ketophosphonates or β,γ-unsaturated α-ketoesters with allenic esters gives the corresponding highly functionalized tetrahydropyran and dihydropyran derivatives in good to excellent yields and moderate to good regioselectivities under mild conditions.
authors.affiliation: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China.
authors.forename: Cheng-Kui
authors.initials: CK
authors.lastname: Pei
authors.forename: Lei
authors.initials: L
authors.lastname: Wu
authors.forename: Zhong
authors.initials: Z
authors.lastname: Lian
authors.forename: Min
authors.initials: M
authors.lastname: Shi
mesh_terms: D002384:Catalysis; D003500:Cyclization; D004952:Esters; D009682:Magnetic Resonance Spectroscopy; D063065:Organophosphonates / Q000737:chemistry*; D010879:Piperazines / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D004952:Esters; D063065:Organophosphonates; D010879:Piperazines; C007306:triethylenediamine