20264-91-9Relevant academic research and scientific papers
RADICAL ANIONS AND GROUP IVB ORGANOMETALLIC ADDUCTS OF NITROPHENYLACETYLENES AND SOME HALOGENATED DERIVATIVES
Alberti, Angelo,Pedulli, Gian Franco,Ciminale, Francesco
, p. 3605 - 3608 (1982)
The reaction of the title compounds with several reducing agents and with a number of Group IVB organometallic radicals has been investigated by electron spin resonance spectroscopy.In reducing media the ethynyl derivatives p- and m-NO2C6H4C*CH were found
Method for preparing 1-halogenated alkyne under catalysis of heterogeneous Ag catalyst at room temperature
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Paragraph 0023-0036; 0038, (2021/05/12)
The invention discloses a novel method for preparing 1-halogenated alkyne under the catalysis of a heterogeneous Ag catalyst at room temperature. The method comprises the steps of mixing terminal alkyne compounds containing different substituent groups, N
A copper (II) (II) composite chlorinating agent and copper-based composite chlorinating agent synthesis of 1-chloro-2-aryl acetylene method
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Paragraph 0026-0028, (2016/11/24)
The invention discloses a copper (II) composite chlorinating agent and a method for synthesizing 1-chlorine-2-aryl acetylene based on the copper (II) composite chlorinating agent. The structural formula of the copper (II) composite chlorinating agent is CuCl2.xNaCl.yAl2O3. The chlorinating agent is applicable to chlorination of various substituted aryl acetylene substrates, and is high in universality; the chlorinating agent can directly carry out chlorination reaction on aryl acetylene so as to obtain a 1-chlorine-2-aryl acetylene product; the method is mild in reaction condition, 1-chlorine-2-aryl acetylene can be synthesized with high yield and high selectivity, and the production cost of the 1-chlorine-2-aryl acetylene derivative is greatly lowered.
A versatile and highly efficient method for 1-chlorination of terminal and trialkylsilyl-protected alkynes
Gulia, Nurbey,Pigulski, Bartlomiej,Charewicz, Marta,Szafert, Slawomir
supporting information, p. 2746 - 2749 (2014/03/21)
A highly efficient one-pot procedure for the preparation of 1-chloroalkynes and 1-chlorobutadiynes from terminal and trialkylsilyl-protected precursors is reported. This convenient reaction, proceeding under mild conditions, utilizes N-chlorosuccinimide as the chlorinating agent and tolerates a range of functional groups. A general chlorination of alkynes: A highly efficient one-pot procedure for the preparation of 1-chloroalkynes and 1-chlorobutadiynes from terminal and trialkylsilyl-protected precursors is reported (see figure; TMS=trimethylsilyl, TES=triethylsilyl, TBDMS=tert-butyldimethylsilyl, TIPS=triisopropylsilyl). This convenient reaction, proceeding under mild conditions, utilizes N-chlorosuccinimide as the chlorinating agent and tolerates a range of functional groups.
Synthesis of 1-chloroalkynes from alkynylsilanes using trichloroisocyanuric acid as chlorinating agent
Vilhelmsen, Mie Hojer,Andersson, Asbjorn Sune,Nielsen, Mogens Brondsted
experimental part, p. 1469 - 1472 (2009/12/10)
A new method is reported for preparing 1-chloroalkynes from alkynylsilanes using trichloroisocyanuric acid (TCCA) as chlorinating agent and AgNO 3 for in situ desilylation. The method is selective for trimethylsilyl-protected alkynes relative t
Analysis of substituent effects on C-13 NMR parameters of substituted arylacetylene derivatives. Linear free energy relationships and PM3 semiempirical calculations
Lin, Shaw-Tao,Lee, Chuan-Chen,Liang, David W.
, p. 9619 - 9623 (2007/10/03)
The substituent-induced chemical shifts (SCS) of C(α,β) on the 13C NMR spectra of arylalkynes (i.e. containing H, CH3, Cl and Br) were studied. The correlation between SCS and Hammett constants shows that the tendency of the effect by the substituents on the phenyl ring is Br (ρ=8.15)>Cl (ρ=7.27)>CH3 (ρ=6.79)>H (ρ=5.78). This order can be rationalized as due to the ability of the group on the alkyne to stabilize the partial positive charge on C(β) resulting from polarization with π electron transfer from C(β) to the phenyl ring. The SCS values are also well correlated with the electron densities obtained from PM3 calculations. The solvent effect on the 13C chemical shifts of phenylalkynyl bromide demonstrates a strong dependence on the relative permittivity as well as the shielding character of the solvents. (C) 2000 Elsevier Science Ltd.
