title: Hypervalent iodine(III)-induced oxidative [4+2] annulation of o-phenylenediamines and electron-deficient alkynes: direct synthesis of quinoxalines from alkyne substrates under metal-free conditions.
abstract: Hypervalent iodine(III)-induced oxidative [4+2] annulation of o-phenylenediamines and electron-deficient alkynes under metal-free conditions has been developed. The reaction allows for direct access to quinoxalines bearing two electron-withdrawing groups in an efficient manner.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan. minakata@chem.eng.osaka-u.ac.jp.
authors.forename: Sota
authors.initials: S
authors.lastname: Okumura
authors.forename: Youhei
authors.initials: Y
authors.lastname: Takeda
authors.forename: Kensuke
authors.initials: K
authors.lastname: Kiyokawa
authors.forename: Satoshi
authors.initials: S
authors.lastname: Minakata
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D061565:Cycloaddition Reaction; D004583:Electrons; D007455:Iodine / Q000737:chemistry*; D008670:Metals / Q000737:chemistry; D010084:Oxidation-Reduction; D010655:Phenylenediamines / Q000737:chemistry*; D011810:Quinoxalines / Q000737:chemistry*
chemical_list: D000480:Alkynes; D008670:Metals; D010655:Phenylenediamines; D011810:Quinoxalines; C034193:1,2-diaminobenzene; D007455:Iodine