Synthesis of 2-(2-, 3-, and 4-pyridyl)benzoxazoles by the reaction of phenolic schiff bases with thianthrene cation radical
作者:Myeong Soon Park、Koon Ha Park、Kun Jun、Seung Rim Shin、Sea Wha Oh
DOI:10.1002/jhet.5570390625
日期:2002.11
2-(2-, 3-, and 4-Pyridyl)benzoxazole derivatives were prepared in excellent yields by the oxidative cyclization of phenolicSchiffbases with thianthrene cation radical perchlorate in the presence of 2,6-di-tert-butyl-4-methylpyridine.
Isomeric Fe(ii) MOFs: from a diamond-framework spin-crossover material to a 2D hard magnet
作者:Lihong Li、Guy J. Clarkson、David J. Evans、Martin R. Lees、Scott S. Turner、Peter Scott
DOI:10.1039/c1cc15574a
日期:——
Two Fe(II) coordination polymers formed from isomeric ligands give a diamond-like 3D network exhibiting a gradual SCO and a 2D hard magnet with a large coercive field.
2-Trimethylsiloxyfuran underwent a vinylogous Mannich-typereaction with aldimines under the action of a new chiral phosphoric acid, bearing iodine on the 6,6′-positions of the binaphthyl group, as a chiral Brønsted acid to give γ-butenolide derivatives bearing an amino functionality with high diastereo- and enantioselectivity.
Pd(OAc)2 catalyzed synthesis of 2-aryl- and 2-heteroaryl-benzoxazoles and benzothiazoles in imidazolium ionic liquids (ILs) without additives and with recycling/reuse of the IL
作者:Rajesh G. Kalkhambkar、Kenneth K. Laali
DOI:10.1016/j.tetlet.2012.05.155
日期:2012.8
A facile, high yielding, method for the synthesis of a library of 2-aryl- and 2-heteroaryl-benzoxazoles and benzothiazoles from readily available Schiff bases is reported employing catalytic amounts of Pd(OAc)(2) in imidazolium ionic liquids (bmim)BF4 and (bmim)PF6 without ligands and/or additives. Simple product isolation and recycling/re-use of the IL are additional advantages of this method. (C) 2012 Elsevier Ltd. All rights reserved.
Martins, Francislene J.; Lima, Rebeca Ml; Dos Santos, Juliana Alves, Letters in drug design and discovery, 2016, vol. 13, # 1, p. 107 - 114