55084-15-6Relevant academic research and scientific papers
Tin tetrachloride-catalyzed regiospecific allylic substitution of quinone monoketals: An easy entry to benzofurans and coumestans
Liu, Yingjie,Liu, Jingxin,Wang, Mang,Liu, Jun,Liu, Qun
supporting information, p. 2678 - 2682 (2013/01/15)
A highly regioselective allylic substitution of quinone monoketals with a-oxoketene dithioacetals is achieved under the catalysis of only tin tetrachloride (1 mol%). The advantages of the reaction, including its simplicity, rapidity, low catalyst loading of inexpensive tin tetrachloride, mild conditions and; in particular, the regiospecificity, is proposed to be due to a pseudo-intramolecular process. This new synthetic method provides a facile [3+2] cycloaddition route to benzofurans and is highlighted by the synthesis of coumestans.
Aerobic, Cu-catalyzed desulfitative C-C bond-forming reaction of ketene dithioacetals/vinylogous thioesters and arylboronic acids
Dong, Ying,Wang, Mang,Liu, Jun,Ma, Wei,Liu, Qun
supporting information; experimental part, p. 7380 - 7382 (2011/08/05)
A new Cu-catalyzed thioorganic-boronic acid desulfitative C-C bond-forming reaction involving ketene dithioacetals/ vinylogous thioesters is reported to proceed without the assistance of ligating S-pendant. Vinylogous thiolesters and tetrasubstituted olefins were prepared by this reaction in which Cu catalyst plays a dual role under aerobic conditions.
Synthesis of substituted isoxazoles and pyrazoles from α-α Dioxoketen dithioacetals under solvothermal conditions
Musad, Ebraheem Abdu,Rai, K. M. Lokanatha
scheme or table, p. 3569 - 3576 (2011/02/22)
Some new 3,4,5-substituted isoxazoles, 3,4,5 and 1,3,4,5-substituted pyrazoles were prepared by reaction of,-oxoketen dithioacetals with hydroxylamine hydrochloride; phenyl hydrazine and hydrazine hydrate respectively under solvothermal conditions involving an ecofriendly method without any environmental pollution. The yields are in the range of 71-91%. The structure of the new compounds were established upon their elemental analysis, IR, 1H NMR, and 13C NMR. Copyright Taylor & Francis Group, LLC.
Isothiazolopyridones: Synthesis, structure, and biological activity of a new class of antibacterial agents
Wiles, Jason A.,Hashimoto, Akihiro,Thanassi, Jane A.,Cheng, Jijun,Incarvito, Christopher D.,Deshpande, Milind,Pucci, Michael J.,Bradbury, Barton J.
, p. 39 - 42 (2007/10/03)
We report the syntheses of first-generation derivatives of isothiazolopyridones and their in vitro evaluation as antibacterial agents. These compounds, containing a novel heterocyclic nucleus composed of an isothiazolone fused to a quinolizin-4-one (at C-2 and C-3 of the quinolizin-4-one), were prepared using a sequence of seven synthetic transformations. The solid-state structure of 7-chloro-9-ethyl-1-thia-2,4a- diazacyclopenta[b]naphthalene-3,4-dione was determined by X-ray diffraction. The prepared derivatives of desfluoroisothiazolopyridones exhibited (a) antibacterial activity against Gram-negative and Gram-positive organisms, (b) inhibitory activities against DNA gyrase and topoisomerase IV, and (c) no inhibitory activity against human topoisomerase II.
A convenient one-pot synthesis of ketene dithioacetals
Villemin,Alloum
, p. 301 - 303 (2007/10/02)
An easy synthesis of ketene dithioacetals 2 and 3 by the condensation of carbon disulfide and active methylene compounds 1 with subsequent alkylation in the presence of potassium fluoride is described.
Synthesis, Reactions, and Tautomerism of Ketene N,S-Acetals with Benzothiazoline Ring
Huang, Zhi-Tang,Shi, Xian
, p. 541 - 547 (2007/10/02)
Ketene dithioacetals 2 react with 2-aminothiophenol to afford the corresponding substituted 2(3H)-methylenebenzothiazoles 3.Some compounds 3 react with α,β-unsaturated esters to give 1H-pyridobenzothiazole derivatives 4 and 5 by an electrophilic addition and cyclocondensation sequence.
