164170-38-1Relevant academic research and scientific papers
Synthesis and molecular structure of new O/N/O ligands: bis-phenol-pyridine and bis-phenol-pyrazole
Silva, Artur M. S.,Almeida, Lucia M. P. M.,Cavaleiro, Jose A. S.,Foces-Foces, Concepcion,Llamas-Saiz, Antonio L.,Fontenas, Christophe,Jagerovic, Nadine,Elguero, Jose
, p. 11645 - 11658 (1997)
Two new heterocyclic ligands, 2,6-bis-(2'-hydroxphenyl)pyridine 2 and 3,5-bis-(2'-hydroxyphenyl)pyrazole 4 have been prepared. The molecular structures of 2,6-bis-(2'-methoxyphenyl)pyridine 1, the tetrafluoroborate salt of 2,6-bis-(2'-hydroxyphenyl)pyridine 3 (a monohydrate) and that of compound 4 have been determined by X-Ray analysis. In 1, the phenyl rings are oriented so that the oxygen atoms of the methoxy groups are placed away from the nitrogen of the pyridine to overcome electronic repulsion. In salt 3, intramolecular hydrogen bonds are found between tile pyridinium proton and the hydroxyl atoms which are involved in strong O-H···O and O-H···F interactions. In addition, the water molecule participates in a bridging hydrogen bond network with the BF4-. The molecules in 4, are also held together by hydrogen bonds where the hydroxyl groups act as both a donor and an acceptor and are responsible for the formation of chains.
Metal-free Synthesis of Spiro-2,2′-benzo[b]furan-3,3′-ones via PhI(OAc)2-Mediated Cascade Spirocyclization
Xing, Qingyu,Liang, Huiyuan,Bao, Mingmai,Li, Xuemin,Zhang, Jingran,Bi, Tianhao,Zhang, Yilin,Xu, Jun,Du, Yunfei,Zhao, Kang
, p. 4669 - 4673 (2019/09/17)
Treating the benzyl protected 3-hydroxy-1,3-bis(2-hydroxyphenyl)prop-2-en-1-ones solely with PhI(OAc)2 (PIDA) in DCE at room temperature readily furnished the seldom studied spiro-2,2′-benzo[b]furan-3,3′-ones in satisfactory to excellent yields. The hypervalent iodine reagent enables the metal-free cascade spirocyclization resulting in the dual oxidative C?O bond formation. (Figure presented.).
