Results 271 to 280 of about 80,245 (335)

Fluorescence decay times of naphthalene and naphthalene excimers

Molecular Physics, 1965
Fluorescence spectra and fluorescence decay times of naphthalene and methylnaphthalenes in solution have been measured under various conditions, i.e. in several different solvents and at different temperatures from 300°k to 100°k. Furthermore, the concentration dependence of the fluorescence decay time was examined in detail in order to determine the ...
Noboru Mataga, Hitoshi Nishimura, Masao Tomura   +2 more
openaire   +2 more sources

Naphthalene Analogues of Lignans

The Journal of Organic Chemistry, 2002
The methodology for the synthesis of podophyllotoxin and thuriferic acid-type lignans has been applied to derivatives carrying a naphthalene moiety. Starting from the 1,3-dithiane of 2-naphthaldehyde afforded the expected analogues in the 2,1-naphthalene series.
Manuel Medarde, Pilar Puebla, Blanca Madrigal, Esther Caballero, Rafael Peláez   +4 more
openaire   +3 more sources

Generation of ortho-SF5-Benzyne and Its Diels-Alder Reactions with Furans: Synthesis of 1-SF5-Naphthalene, Its Derivatives, and 1,6(1,7)-Bis-SF5-naphthalenes.

Journal of Organic Chemistry, 2016
Generation of ortho-SF5-benzyne was achieved by a lithiation/elimination sequence starting from 2-fluoro-SF5-benzene. The highly reactive ortho-SF5-benzyne intermediate was trapped by furan or 2-methylfuran in situ, and the obtained stable Diels-Alder ...
O. Kanishchev, W. Dolbier
semanticscholar   +1 more source

New singlet oxygen donors based on naphthalenes: synthesis, physical chemical data, and improved stability.

Chemistry, 2015
Singlet oxygen donors are of current interest for medical applications, but suffer from a short half-life leading to low singlet oxygen yields and problems with storage.
M. Klaper, T. Linker
semanticscholar   +1 more source

Fungal transformation of naphthalene

Archives of Microbiology, 1978
Eighty-six species of fungi belonging to sixty-four genera were examined for their ability to metabolize naphthalene. Analysis by thin-layer and high pressure liquid chromatography revealed that naphthalene metabolism occurred in forty-seven species belonging to thirty-four genera from the major fungal taxa.
David T. Gibson, Richard L. Hebert, Carl E. Cerniglia, Paul J. Szaniszlo   +3 more
openaire   +3 more sources

TBAI/K2S2O8 Initiated Radical Cyclization to Synthesize β‐ Arylsulfonyl Naphthalenes from Homopropargylic Alcohols and Sulfonyl Hydrazides

, 2017
A metal-free radical addition method for the synthesis of β-arylsulfonyl naphthalenes with homopropargylic alcohols and sulfonyl hydrazides has been developed.
Xiaodong Yang, Lianbiao Zhao, Bingxiang Yuan, Zhenjie Qi, Rulong Yan   +4 more
semanticscholar   +1 more source

Regioselective Synthesis of Polyheterohalogenated Naphthalenes via the Benzannulation of Haloalkynes.

Chemistry, 2015
Independent control of halide substitution at six of the seven naphthalene positions of 2-arylnaphthalenes is achieved through the regioselective benzannulation of chloro-, bromo-, and iodoalkynes.
D. Lehnherr, Joaquin M Alzola, E. Lobkovsky, William R. Dichtel   +3 more
semanticscholar   +1 more source

A Photocatalyzed Synthesis of Naphthalenes by Using Aniline as a Traceless Directing Group in [4 + 2] Annulation of Amino-benzocyclobutenes with Alkynes

, 2017
We report a visible-light-promoted synthesis of substituted naphthalenes via [4 + 2] annulation of amino-benzocyclobutenes with alkynes. Amino-benzocyclobutenes, which are conveniently synthesized by [2 + 2] cycloaddition of arynes with ketenes followed ...
Qile Wang, N. Zheng
semanticscholar   +1 more source

Lewis acid catalyzed cascade reaction to carbazoles and naphthalenes via dehydrative [3 + 3]-annulation.

Organic Letters, 2014
A novel Lewis acid catalyzed dehydrative [3 + 3]-annulation of readily available benzylic alcohols and propargylic alcohols was developed to give polysubstituted carbazoles and naphthalenes in moderate to good yields with water as the only byproduct. The
Shaoyin Wang, Zhuo Chai, Yun Wei, Xiancui Zhu, Shuangliu Zhou, Shaowu Wang   +5 more
semanticscholar   +1 more source

Identifying iron foundries as a new source of unintentional polychlorinated naphthalenes and characterizing their emission profiles.

Environmental Science and Technology, 2014
Iron foundries have been identified as dioxin sources in previous field investigations. Similar formation mechanisms between dioxins and unintentional polychlorinated naphthalenes (PCNs) have led us to speculate that iron foundries are also potential PCN
Guorui Liu, P. Lv, Xiaoxu Jiang, Z. Nie, M. Zheng   +4 more
semanticscholar   +1 more source