90-12-0Relevant articles and documents
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Gilman,Moore
, p. 1843,1846 (1940)
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Buehler
, p. 1558 (1968)
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Radiation-induced C-C Bond Cleavage in 1,2-Diarylethanes as Model compounds of Coal. Part 1.- Pulse and Steady-state Radiolysis of 1,2-Di(1-naphthyl)ethane
Haenel, Matthias W.,Richter, Udo-Burckhard,Solar, Sonja,Getoff, Nikola
, p. 311 - 319 (1990)
1,2-Di(1-naphthyl)ethane (1,2-DNE) has been used to study the radiation-induced C-C bond cleavage of the ethane linkage.Pulse radiolysis was applied both in the absence and presence of NaAlH4 and NaAlH2(OR)2 used as scavengers for solvent cations.In the presence of the sodium aluminium hydrides the radical anions of 1,2-DNE are stabilized by the metal cation, resulting in the formation of radical anion/sodium cation pairs (Na+, 1,2-DNE.-), these species have a rather long lifetime (τ>2 ms) in DME as well as in THF, and show three absorption bands at 330, 370 and 750 nm.In THF ε370=14000 dm3 mol-1 cm-1 and ε750=5000 dm3 mol-1 cm-1 were established.Cleavage of the ethano bridge of 1,2-DNE was achieved by means of steady-state as well as multi-pulse radiolysis in the presence of alkali-metal aluminium hydrides.The efficiency of this process was studied by using NaAlH4, NaAlH2(OR)2, NaAlH2Et2, NaAlEt4 and LiAlH4 in THF as well as in DME.The most efficient C-C bond cleavage results from the successive attack of two sodium cation/electron ion pairs (Na+, e-) forming the unstable dianions (2 Na+, 1,2-DNE2-).These decompose under scission of the ethano bridge, producing naphthylmethyl carbanionic fragments C10H7CH2-Na+ which supposedly form aluminate salts, e.g.C10H7CH2AlH3-Na+, with AlH3 generated in the scavenging processes.From these aluminate salts 1-methylnaphthalene is obtained through hydrolysis.
Preparation method of naphthalene ring C marked α .
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Paragraph 0046-0047; 0049; 0056-0057; 0059; 0066-0067; 0069, (2021/10/05)
The invention discloses C labeled α - naphthalene acetic acid preparation method and belongs to the field of radioisotope C labeled compounds. C-labeled α - naphthylacetic acid preparation method, C radioisotope labeling is introduced on a naphthalene ring structure α -naphthol acid, C labeling site is in α-position. The method has the advantages that the reaction raw materials are easily available, the synthesis steps are high in yield, the total yield is more 60%, C marker isotopes are less in use amount, and waste is generated. The marker site α-position on the naphthalene ring is less likely to be metabolized compared to C-labeled branched acetic acid, and the synthesized C-labeled compound provides a better study of α -naphthoic acid in the environment.
A New Protocol for Catalytic Reduction of Alkyl Chlorides Using an Iridium/Bis(benzimidazol-2′-yl)pyridine Catalyst and Triethylsilane
Fukuyama, Takahide,Hamada, Yuki,Ryu, Ilhyong
, p. 3404 - 3408 (2021/07/14)
The reduction of alkyl chlorides using triethylsilane is investigated. Primary, secondary, tertiary, and benzylic C-Cl bonds are effectively converted into C-H bonds using an [IrCl(cod)] 2/2,6-bis(benzimidazol-2′-yl)pyridine catalyst system. This catalyst system is quite simple since the tridentate N-ligand can be easily prepared in one step from commercially available reagents.
Synthesis of renewable alkylated naphthalenes with benzaldehyde and angelica lactone
Cong, Yu,Li, Guangyi,Li, Ning,Wang, Aiqin,Wang, Ran,Wang, Xiaodong,Xu, Jilei,Zhang, Tao
supporting information, p. 5474 - 5480 (2021/08/16)
Herein, we report a new route for the synthesis of renewable alkylated naphthalenes (ANs) with benzaldehyde and angelica lactone, two platform compounds that can be derived from lignocellulose.