Results 291 to 300 of about 80,245 (335)

Gold(I)-catalyzed regioselective inter-/intramolecular addition cascade of di- and triynes for direct construction of substituted naphthalenes.

Journal of Organic Chemistry, 2012
The gold-catalyzed cascade intermolecular addition-intramolecular carbocyclization reaction of dialkynylbenzenes was developed. In this reaction, regioselective addition of an external nucleophile toward the terminal alkyne and subsequent 6-endo-dig ...
Saori Naoe, Yamato Suzuki, Kimio Hirano, Yusuke Inaba, S. Oishi, N. Fujii, H. Ohno   +6 more
semanticscholar   +1 more source

BIOLOGICAL OXIDATION OF NAPHTHALENE

Canadian Journal of Microbiology, 1954
Conditions have been established for the oxidation of naphthalene by a pseudomonad based on the yields of ether extractable substances. Vigorous aeration yielded approximately three times the product obtained from unaerated controls. Oxidations with media adjusted initially to pH 8 gave higher yields than those adjusted to lower pH levels. Calcium and
R. W. Stone, R. J. Strawinski
openaire   +3 more sources

Directly fused highly substituted naphthalenes via Pd-catalyzed dehydrogenative annulation of N,N-dimethylaminomethyl ferrocene using a redox process with a substrate.

Organic Letters, 2012
N,N-Dimethylaminomethyl ferrocenium could be generated in situ and served as a terminal oxidant for Pd-catalyzed directly dehydrogenative annulations of N,N-dimethylaminomethyl ferrocene and internal alkynes. This procedure utilized the redox activity of
Hao Zhang, Xiuling Cui, Xi Yao, Hui Wang, Jianye Zhang, Yangjie Wu   +5 more
semanticscholar   +1 more source

Metabolism of Naphthalene in Roosters

Xenobiotica, 1988
1. The metabolism of naphthalene in roosters was similar to that in rats. At least 45% of the dose was isolated from the urine as metabolites that could be formed from arene oxide precursors. 2. Urine was the major route for excretion (79%) of 14C-naphthalene from colostomized roosters. Roosters with cannulated bile ducts excreted about 24% of the dose
Jerome E. Bakke, K. L. Davison
openaire   +3 more sources

Rhenium-Catalyzed Regioselective Synthesis of 1,2-Disubstituted Naphthalenes.

, 2013
A rhenium complex-catalyzed reaction of internal alkynes with phenylacetaldehyde dimethylacetal in the presence of stoichiometric amounts of water is reported to give low to moderate yields of 1,2-disubstituted naphthalenes.
R. Umeda, Satoru Nishi, Aya Kojima, Kenta Kaiba, Y. Nishiyama   +4 more
semanticscholar   +1 more source

Synthesis of naphthalenes via platinum-catalyzed hydroarylation of aryl enynes.

Organic Letters, 2012
An efficient synthetic method of functionalized naphthalenes having hydrogen, alkyl, alkenyl, aryl, or heteroaryl groups on the 4-position and ethoxycarbonyl group on the 2-position was developed through selective Pt-catalyzed 6-endo intramolecular ...
Dongjin Kang, Jinsik Kim, Susung Oh, P. Lee   +3 more
semanticscholar   +1 more source

Changes in ecotoxicity of naphthalene and alkylated naphthalenes during photodegradation in water

Chemosphere, 2019
Crude oil released into the environment contains many polycyclic aromatic hydrocarbons (PAHs). Alkylated PAHs are more abundant than unsubstituted PAHs and their toxicity is also of serious concern. Among the various physical, chemical, and biological weathering processes of crude oils, photodegradation is one of the most important for determining the ...
Hyun-Joong Kang, Yerin Jung, Jung-Hwan Kwon   +2 more
openaire   +3 more sources

One-pot synthesis of phthalazines and pyridazino-aromatics: a novel strategy for substituted naphthalenes.

Organic Letters, 2012
A new one-pot strategy for the synthesis of phthalazines and pyridazino-aromatics starting from aromatic aldehydes has been developed. A variety of substituents ranging from electron withdrawing to donating is tolerated furnishing the desired 1,2-diazine
Simon N. Kessler, Hermann A. Wegner
semanticscholar   +1 more source

Direct synthesis of substituted naphthalenes from 1,3-dicarbonyl compounds and 1,2-bis(halomethyl)benzenes including a novel rearrangement aromatization of benzo[c]oxepine.

Organic Letters, 2012
An unexpected rearrangement aromatization of benzo[c]oxepine has been revealed to synthesize substituted naphthalenes. This observation was further exploited to develop an efficient approach for the construction of naphthalenes from simple and ...
Jun-gang Wang, Meng Wang, Jia-Chen Xiang, Yanping Zhu, Wei-jian Xue, A. Wu   +5 more
semanticscholar   +1 more source

Investigation of the Benzene–Naphthalene and Naphthalene–Naphthalene Potential Energy Surfaces: DFT/CCSD(T) Correction Scheme

ChemPhysChem, 2008
AbstractThe potential energy surfaces of the naphthalene dimer and benzene–naphthalene complexes are investigated using the recently developed DFT/CCSD(T) correction scheme [J. Chem. Phys. 2008, 128, 114 102]. One and three minima are located on the PES of the benzene–naphthalene and the naphthalene dimer complexes, respectively, all of which are of ...
Miroslav Rubeš, Petr Nachtigall, Ota Bludský   +2 more
openaire   +3 more sources