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1.
[Chemical reaction: See text] The synthesis and unique reactivity of a series of arylsulfonate-based nucleophile assisting leaving groups (NALG) containing oligomeric ether units (including crown ethers) attached to the arylsulfonyl ring in the ortho orientation are described. The reactions of a variety of these ether-containing alkyl sulfonates with metal halides proceeded at substantially greater rates than electronically similar sulfonates. These ether-containing leaving groups also displayed marked selectivity for lithium halides relative to the corresponding sodium and potassium salts in nucleophilic displacement reactions. 相似文献
2.
Seyed Abolghasem Hashemi 《Tetrahedron letters》2012,53(38):5141-5143
A regioselective method for the synthesis of (E)-3-[2-(arylmethylene)-1-(arylsulfonyl)hydrazino]-2-propenoates is described. The reaction takes place between arylsulfonyl hydrazones and alkyl propiolates in the presence of triphenylphosphine as the catalyst. 相似文献
3.
[reaction: see text] Herein, we describe the synthesis of fluorescent 2-(arylsulfonyl)methacrylates and its polymers. These novel trifunctional monomers, possessing a fluorescent arylsulfonyl (ArSO(2)) group, an alkyl group (R), and a polymerizable olefin, serve as useful building blocks for functionalized fluorescent polymers. 相似文献
4.
5.
George W. Kabalka Marepally Srinivasa Reddy Min-Liang Yao 《Tetrahedron letters》2009,50(52):7340-1559
A facile synthesis of diaryl disulfides from arylsulfonyl chlorides in the presence of triphenylphosphine has been developed. 相似文献
6.
The synthesis of some symmetrically substituted bis(arylsulfonyl)furoxans from aryl nitromethyl sulfones is reported. 相似文献
7.
A novel protocol for the direct arylthiolation of electron-rich arenes is described. Applying arylsulfonyl cyanides in the presence of catalytic amounts of Pd allows for a straightforward synthesis of diaryl sulfides. 相似文献
8.
An efficient synthesis of N‐arylsulfonylindoles from indoles and arylsulfonyl chlorides in the presence of triethylbenzylammonium chloride (TEBA) and NaOH at room temperature is described. 相似文献
9.
A highly efficient and mild palladium‐catalyzed cross‐coupling of arylsulfonyl hydrazides and aryl bromides for the selective synthesis of unsymmetrical biaryls has been developed. This methodology has the advantages of easily accessible starting materials, functional group tolerance and a wide range of substrates, which provide rapid access to biaryls derivatives. In this protocol, abundant and stable aryl bromides serve as the aryl sources by coupling reaction of the aryl group generated from arylsulfonyl hydrazides via in situ release of nitrogen and sulfur dioxide. No external oxidants or acids are needed for this kind of transformation. 相似文献
10.
The synthesis of 1-arylsulfonylpyrroles is normally accomplished by the condensation of an arylsulfonyl chloride with pyrrolylpotassium.1 We wish to report a facile synthesis of 1-arylsulfonylpyrroles which is versatile, proceeds in moderate to good yield and eliminates the necessity of using pyrophoric potassium. 相似文献
11.
Three-component reaction of arylsulfonamides,dialkyl acetylenedicarboxylates,and ethyl chlorooxoacetate promoted by triphenylphosphine and triethylamine provides a sufficient route for the synthesis of dialkyl N-(arylsulfonyl)-4-ethoxy-5-oxo-2,5-dihydro -1H-pyrolle-2,3-dicarboxylates in good yields. 相似文献
12.
The Pd‐catalyzed homodimerization with respect to arylsulfonyl chlorides as an efficient method for the synthesis of biaryls has been developed. This desulfonylative reaction which was performed at reflux in 1,4‐dioxane for 4 h under air afforded the desired products in good to excellent yields. 相似文献
13.
Norton P. Peet 《Journal of heterocyclic chemistry》1986,23(1):193-197
Several oxamates were prepared from ethyl oxalyl chloride and 5-amino-4-cyanopyrazoles substituted in the 1-position with aryl, aroyl and arylsulfonyl groups. Both aroyl and arylsulfonyl groups suffered chloride-induced cleavage during this process. The synthesis of 7-(6-chloro-3-pyridazinyl)-7H-pyrazolo[3,4-d]-1,2,3-tri-azin-4(3H)-one ( 11 ) and its reaction with methanol to give 1-(6-chloro-3-pyridazinyl)-5-methoxy-1H-pyrazole-4-carboxamide ( 12 ) are also reported. A mechanism for this interesting transformation is presented. 相似文献
14.
[reaction: see text] A simple and efficient method for the synthesis of unsymmetrical diaryl sulfones using the palladium-catalyzed coupling of aryl boronic acids and arylsulfonyl chlorides has been developed. High product yields, a short reaction time, and mild reaction conditions are important features of this method. 相似文献
15.
Manjula Singh Arvind K. Yadav Lal Dhar S. Yadav Rana Krishna Pal Singh 《Tetrahedron letters》2018,59(33):3198-3201
A convenient and straightforward synthesis of 6-sulfonylated phenanthridines via silver-catalyzed sequential radical insertion, cyclization and aromatization of 2-isocyanobiphenyls is reported. The protocol does not require a phenanthridine scaffold as a substrate and presents a highly regioselective synthesis of 6-alkyl/arylsulfonyl phenanthridines. The protocol utilizes readily available and easy to handle sodium sulfinates as sulfonating agents and potassium persulfate as an oxidant to afford good to excellent yields of the desired products in a one-pot operation at room temperature. 相似文献
16.
A new, efficient protocol for the synthesis of di(hetero)aryl sulfides is described. Cheap and easily available arylsulfonyl chlorides as a sulfur source reductively couple with electron-rich (hetero)arenes (e.g., indolizines, indoles, electron-rich benzenes, etc.) in the presence of triphenylphosphine to afford di(hetero)aryl thioethers in good yields. 相似文献
17.
Systematic analysis of the persulfonylation of branched aromatic oligoamines with different arylsulfonyl chlorides allowed optimization of the repetitive steps involved in the synthesis of the sulfonimide-based dendrimers. The optimized procedures afforded the fourth generation N- and pentaphenylene-centered dendrimers with 16 and 32 peripheral groups, respectively. Analysis of products of incomplete substitution showed that the amino groups in aromatic oligoamines are persulfonylated consecutively. 相似文献
18.
A. V. Smolobochkin E. A. Anikina A. S. Gazizov A. R. Burilov M. A. Pudovik 《Russian Journal of Organic Chemistry》2017,53(2):199-202
Acid-catalyzed reaction of 1-[(4-chlorophenyl)sulfonyl]-2-ethoxypyrrolidine with phenols leads to the formation of new 1-(arylsulfonyl)pyrrolidines. The reaction proceeds under mild conditions and may be used as a convenient method for the synthesis of pyrrolidine-1-sulfonylarene derivatives containing a phenol fragment in the position 2. 相似文献
19.
V. M. Chernyshov G. V. Kozlenko V. A. Taranushich 《Russian Journal of Applied Chemistry》2011,84(2):230-235
Arylsulfonylation of 1-acetyl-3,5-diamino-1,2,4-triazole with arylsulfonyl chlorides in pyridine, with the subsequent hydrolysis of the acetyl group, was studied; a new regioselective method for synthesis of N-(5-amino-1H-1,2,4-triazol-3-yl)arylsulfonamides was developed. 相似文献