78338-67-7Relevant academic research and scientific papers
2,4-Diaminotriazines as anti-infective agents
De, Suparna S.,Vogalu, Siva K.,Ansari, Nazima,Patil, Rajendra,Sriram, Dharmarajan,Degani, Mariam S.
, p. 1211 - 1215 (2020/12/04)
Triazines are scaffolds of interest to medicinal chemists as they have a wide variety of pharmacological activities. Molecules with the triazine moiety have been explored extensively for their anti-infective potential. In this paper, we report a series of
N-AMINOSULFONYL BENZAMIDES
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Page/Page column 74, (2013/07/19)
The invention relates to sulfonamide derivatives, to their use in medicine, to compositions containing them, to processes for their preparation and to intermediates used in such processes. More particularly the invention relates to a new sulphonamide Nav 1.7 inhibitors of formula (I) or a pharmaceutically acceptable salt thereof, wherein Z, R1a, R1b, R2, R3, R4 and R5 are as defined in the description. Nay 1.7 inhibitors are potentially useful in the treatment of a wide range of disorders, particularly pain
Synthesis of diaryl ethers, diaryl sulfides, heteroaryl ethers and heteroaryl sulfides under microwave dielectric heating
Li, Feng,Meng, Qingqing,Chen, Huansheng,Li, Zhiming,Wang, Quanrui,Tao, Fenggang
, p. 1305 - 1313 (2007/10/03)
This paper describes the synthesis of diaryl ethers and sulfides by utilizing microwave heating methodology. The methodology is shown to be rapid and efficient for the coupling of phenols or thiophenol with electron-deficient aryl halides through a SNAr reaction. The scope of the protocol can be expanded to six-membered heterocycles bearing a hydroxyl group as well as to the reaction of 2-pyrimidinethiol with mildly activated aryl halides, providing heteroaryl ethers and sulfides, respectively. The advantages of the present method include the wide substrate scope, the obviation of metal catalysts, ease of product isolation, and high purity of products. Georg Thieme Verlag Stuttgart.
Neutral alumina-K2CO3: An eco-friendly system for synthesis of diaryl ethers under microwave irradiation
Narsaiah, A. Venkat,Nagaiah
, p. 2478 - 2481 (2007/10/03)
Electron deficient halo benzenes undergo smoothly direct condensation with a wide range of phenols under microwave irradiation using neutral alumina as solid support to yield biaryl ethers in excellent yields.
Microwave-assisted synthesis of diaryl ethers without catalyst
Li, Feng,Wang, Quanrui,Ding, Zongbiao,Tao, Fenggang
, p. 2169 - 2171 (2007/10/03)
(Matrix presented) Diaryl ethers have been prepared by direct coupling of phenols including those that bear a strong electron-attracting substituent to electron-deficient aryl halides through SNAr-based addition reactions with assistance of microwave irradiation in high to excellent yields within 5-10 min. No catalysts were required under our conditions.
Synthesis of (±)-combretastatin D-1 and combretastatin D-2
Rychnovsky,Hwang
, p. 5414 - 5418 (2007/10/02)
(±)-Combretastatin D-1 was synthesized in 16 steps by way of its congener, combretastatin D-2. In the key step, the strained 15-membered lactone ring was formed using high-dilution Mitsunobu conditions in 89% yield. Saturated seco acid 4 was a much better substrate for the cyclization reaction than the unsaturated seco acid 3.
Aryloxenium Ions. Generation from N-(Aryloxy)pyridinium Tetrafluoroborates and Reaction with Anisole and Benzonitrile
Abramovitch, Rudolph A.,Alvernhe, Gerard,Bartnik, Romuald,Dassanayake, Nissanke L.,Inbasekaran, Mutiah N.,Kato, Shiego
, p. 4558 - 4565 (2007/10/02)
N-(Aryloxy)pyridinium tetrafluoroborates (4) decompose thermally at 180-200 deg C in anisole and benzonitrile to form products of intermolecular C-O-C and C-C bond formation.With anisole, diphenyl ethers (5) and hydroxybiphenyls (6) are formed; with benzonitrile, the main product is benzoxazole (14).A homolytic process was ruled out by showing that none of these products were formed when perbenzoyl p-nitrophenyl carbonate (18) was decomposed in these solvents.The main products in this case were those of homolytic phenylation (and benzoyloxylation with anisole).A concerted SN2-type heterolytic process was ruled out by showing that the nature of the substituent in the pyridine ring had no effect on the isomer ratios of 5 and 6 in the thermolysis of 4 (X = p-NO2) in anisole.The results are explained in terms of a unimolecular heterolysis of 4 to give the pyridine and aryloxenium ion 2 which now attacks solvent molecules.When an electron-withdrawing substituent is present in 2, more C-O-C than C-C products are formed in anisole.When it is absent only products of C-C bond formation are found.PhO+ is apparently electrophilic enough to attack anisole and give the four possible hydroxymethoxybiphenyls (10-13).
