Results 251 to 260 of about 80,245 (335)

Comprehensive Evaluation of Dietary Exposure and Health Risk of Polychlorinated Naphthalenes

Environmental Science & Technology, 2022
Intake from food is considered an important route of human exposure to polychlorinated naphthalenes. To our knowledge, several studies have quantified dietary exposure but only in European countries and measuring only a few of the 75 congeners.
Yongning Wu, Minghui Zheng, Lili Yang
exaly   +2 more sources

One-Pot Synthesis of Methyl-Substituted Benzenes and Methyl-Substituted Naphthalenes from Acetone and Calcium Carbide

Industrial & Engineering Chemistry Research, 2019
Methyl-substituted benzenes and methyl-substituted naphthalenes are important starting chemicals for organic synthesis and polymer production and superior additives of high-density fuels.
Qingya Liu, Zhenyu Liu
exaly   +2 more sources

Rapid Access to Orthogonally Functionalized Naphthalenes: Application to the Total Synthesis of the Anticancer Agent Chartarin

Angewandte Chemie - International Edition, 2016
We report the synthesis of orthogonally functionalized naphthalenes from simple, commercially available indanones in four steps. The developed method proceeds through a two-step process that features a thermally induced fragmentation of a cyclopropane ...
Thomas Magauer, K Hara
exaly   +2 more sources

Sequential Carbon–Carbon/Carbon–Selenium Bond Formation Mediated by Iron(III) Chloride and Diorganyl Diselenides: Synthesis and Reactivity of 2-Organoselenyl-Naphthalenes

Journal of Organic Chemistry, 2017
In this paper, we report an intramolecular cyclization of benzylic-substituted propargyl alcohols promoted by iron(III) chloride and diorganyl diselenides to give 2-organoselenyl-naphthalenes via a sequential carbon-carbon/carbon-selenium bond formation.
Davi Fernando Back, Gilson Zeni
exaly   +2 more sources

Catalytic Asymmetric Hydrogenation of Naphthalenes

Angewandte Chemie - International Edition, 2012
The catalytic asymmetric hydrogenation of heteroarenes has been intensively studied during the last decade. Nowadays, various heteroaromatics, for example, indoles, pyrroles, and quinolines, can be reduced to the corresponding chiral heterocycles with ...
Ryoichi Kuwano, Shigeki Matsunaga
exaly   +2 more sources

Azulene–Naphthalene, Naphthalene–Naphthalene, and Azulene–Azulene Rearrangements

The Journal of Organic Chemistry, 2022
The mechanism(s) of thermal rearrangement of azulenes have been enigmatic for several decades. Herein, we have employed density functional theory (DFT) calculations at the M06-2X/6-311+G(d,p) level together with single-point calculations at the CCSD(T) level to assess possible mechanisms of the experimentally observed azulene and naphthalene ...
M. Saeed Mirzaei, Avat Arman Taherpour, Curt Wentrup   +2 more
openaire   +2 more sources

Rh(III)-Catalyzed Enaminone-Directed C-H Coupling with Diazodicarbonyls for Skeleton-Divergent Synthesis of Isocoumarins and Naphthalenes.

Organic Letters, 2022
Diversity-oriented synthesis is tremendously useful for expanding the explorable chemical space but restricted by the limited available toolbox of skeleton-diversification chemistry.
Weiping Wu, Xuan Wu, Shuaixin Fan, Jin Zhu   +3 more
semanticscholar   +1 more source

Photooxygenation of Naphthalene

ChemPhotoChem, 2021
AbstractThe photooxygenation of naphthalene to the corresponding endoperoxide (EPO) under various conditions is described. Substantial conversion is only observed at −10 °C and after more than two days, indicating that the [4+2] cycloaddition of singlet oxygen to this acene proceeds much more slowly than corresponding reactions of substituted ...
Werner Fudickar, Torsten Linker
openaire   +3 more sources

Switching The Mallory Reaction to Synthesis Of Naphthalenes, Benzannulated Heterocycles and their Derivatives.

Journal of Organic Chemistry, 2020
This review analyzes the new life of a long-known reaction, the photocyclization of diarylethenes, which became a classical tool for the synthesis of phenanthrenes and their heterocyclic analogs (Mallory reaction).
A. Lvov
semanticscholar   +1 more source