61982-86-3Relevant academic research and scientific papers
Synthesis of naphthalene derivatives through inexpensive BF 3·Et2O-catalyzed annulation reaction of arylacetaldehydes with arylalkynes
Xiang, Shikai,Hu, Hao,Ma, Jing,Li, Yuanzhuo,Wang, Biqin,Feng, Chun,Zhao, Keqing,Hu, Ping,Chen, Xiaozhen
, p. 945 - 951 (2013/08/23)
An inexpensive BF3·Et2O-catalyzed annulation reaction of arylacetaldehydes with arylalkynes has been developed. Various substituted phenylacetaldehydes and phenylacetylenes can undergo this reaction, producing corresponding α-aryl su
Excited state intramolecular proton transfer (ESIPT) from phenol to carbon in selected phenylnaphthols and naphthylphenols
Basari?, Nikola,Do?li?, Nacrossed D Signa,Ivkovi?, Jakov,Wang, Yu-Hsuan,Veljkovi?, Jelena,Mlinari?-Majerski, Kata,Wan, Peter
, p. 1811 - 1823 (2013/04/10)
ESIPT and solvent-assisted ESPT in isomeric phenyl naphthols and naphthyl phenols 5-8 were investigated by preparative photolyses in CH 3CN-D2O, fluorescence spectroscopy, LFP, and ab initio calculations. ESIPT takes place only in 5 (D-exchange Φ = 0.3), whereas 6-8 undergo solvent-assisted PT with much lower efficiencies. The efficiency of the ESIPT and solvent-assisted PT is mainly determined by different populations of the reactive conformers in the ground state and the NEER principle. The D-exchange experiments and calculations using RI-CC2/cc-pVDZ show that 5 in S1 deactivates by direct ESIPT from the OH to the naphthalene position 1 through a conical intersection with S0, delivering QM 14 that was detected by LFP (τ = 26 ± 3 ns). ESIPT to position 3 in 5 is possible but it proceeds from a less-populated conformer and involves an energy barrier on S1. In solvent-assisted PT to naphthalene position 4 in 5, zwitterion 17 is formed, which cyclizes to stable naphthofuran photoproducts 9-12. The regiochemistry of the deuteration in solvent-assisted PT was correlated with the NBO charges of the corresponding phenolates/naphtholates 5--8-. Combined experimental and theoretical data indicate that solvent-assisted PT takes place via a sequential mechanism involving first deprotonation of the phenol/naphthol, followed by the protonation by H 2O in the S1 state of phenolate/naphtholate. The site of protonation by H2O is mostly at the naphthalene α-position.
A single-step procedure for the preparation of palladium nanoparticles and a phosphine-functionalized support as catalyst for Suzuki cross-coupling reactions
Costa, Natalia J.S.,Kiyohara, Pedro K.,Monteiro, Adriano L.,Coppel, Yannick,Philippot, Karine,Rossi, Liane M.
experimental part, p. 382 - 389 (2011/02/27)
We here report the preparation of supported palladium nanoparticles (NPs) stabilized by pendant phosphine groups by reacting a palladium complex containing the ligand 2-(diphenylphosphino)benzaldehyde with an amino-functionalized silica surface. The Pd na
