139697-98-6Relevant articles and documents
Bis[alkynylplatinum(II)] Terpyridine Molecular Tweezer/Guest Recognition Enhanced by Intermolecular Hydrogen Bonds: Phototriggered Complexation via the "caging" Strategy
Fu, Tengfei,Han, Yifei,Ao, Lei,Wang, Feng
, p. 2850 - 2853 (2016)
The binding affinity between alkynylplatinum(II) terpyridine molecular tweezer and naphthol-derived guests can be significantly enhanced by embedding an intermolecular O-H - -N hydrogen bond, facilitating the achievement of a responsive host-guest recognition system via the photolabile "caging" strategy.
Cobalt(II)-based Metalloradical Activation of 2-(Diazomethyl)pyridines for Radical Transannulation and Cyclopropanation
Roy, Satyajit,Das, Sandip Kumar,Chattopadhyay, Buddhadeb
supporting information, p. 2238 - 2243 (2018/02/19)
A new catalytic method for the denitrogenative transannulation/cyclopropanation of in-situ-generated 2-(diazomethyl)pyridines is described using a cobalt-catalyzed radical-activation mechanism. The method takes advantage of the inherent properties of a CoIII-carbene radical intermediate and is the first report of denitrogenative transannulation/cyclopropanation by a radical-activation mechanism, which is supported by various control experiments. The synthetic benefits of the metalloradical approach are showcased with a short total synthesis of (±)-monomorine.
Hydration of aromatic terminal alkynes catalyzed by iron(III) sulfate hydrate under chlorine-free conditions
Bassetti, Mauro,Ciceri, Samuele,Lancia, Federico,Pasquini, Chiara
supporting information, p. 1608 - 1612 (2014/03/21)
The hydration of aromatic terminal alkynes performed in acetic acid in the presence of catalytic hydrate ironIII sulfate, Fe2(SO 4)3·nH2O (4-9 mol %), yields the derived aryl methyl ketones with good to excellent yields. Under comparable conditions (18 mol %, 95 C, 24 h), bifunctional substrates were transformed into the monoacetyl or the diacetyl derivatives, depending on the structure of the aromatic diyne. The reaction is compatible with aryl substituents of different nature and ring positions, including hydroxyl, carbonyl groups, and cumulated hydrocarbons. The soft character of the non nucleophilic sulfate anion allows for activation of the triple bond toward carbonoxygen bond formation in the Br?nsted acidic medium. The proposed protocol is based on readily available and non toxic materials, in the absence of chlorine atoms in either the solvent or the metal catalyst.