3221-15-6Relevant academic research and scientific papers
Preparation, characterization and application of MgFe2O4/Cu nanocomposite as a new magnetic catalyst for one-pot regioselective synthesis of β-thiol-1,4-disubstituted-1,2,3-triazoles
Eisavi, Ronak,Naseri, Kazhal
, p. 13061 - 13076 (2021/04/22)
Magnesium ferrite magnetic nanoparticles were synthesized by a solid-state reaction of magnesium nitrate, hydrated iron(iii) nitrate, NaOH and NaCl salts and then calcined at high temperatures. In order to prevent oxidation and aggregation of magnesium ferrite particles, and also for preparing a new catalyst of supported copper on the magnetic surface, the MgFe2O4was covered by copper nanoparticles in alkaline medium. Magnetic nanoparticles of MgFe2O4/Cu were successfully obtained. The structure of the synthesized magnetic nanoparticles was identified using XRD, TEM, EDS, FT-IR, FESEM and VSM techniques. The prepared catalyst was used in the three component one-pot regioselective synthesis of 1,2,3-triazoles in water. The various thiiranes bearing alkyl, allyl and aryl groups with terminal alkynes, and sodium azide in the presence of the MgFe2O4/Cu nanocatalyst were converted to the corresponding β-thiolo/benzyl-1,2,3-triazoles as new triazole derivatives. The effects of different factors such as time, temperature, solvent, and catalyst amount were investigated, and performing the reaction using 0.02 g of catalyst in water at 60 °C was chosen as the optimum conditions. The recovered catalyst was used several times without any significant change in catalytic activity or magnetic property.
PREPARATION METHOD OF THIOL COMPOUND
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Paragraph 0132-0139, (2020/04/17)
Embodiments relate to a method for manufacturing a thiol compound with high purity and high yield, which does not require cryogenic reaction conditions, does not require additional special equipment, and increases the amount of production per hour. The manufacturing method comprises following steps of: obtaining a sulfur-containing heterocyclic compound from a thioepoxy-based compound obtained by conducting a reaction of an epoxy-based compound with a sulfide; and conducting a reaction of the sulfur-containing heterocyclic compound with a thiolating agent.COPYRIGHT KIPO 2020
Green synthesis of thiiranes from epoxides catalyzed by magnetically separable CuFe2O4/Mg(OH)2 nanocomposite in water under benign conditions
Hassanzadeh, Shadi,Eisavi, Ronak,Abbasian, Mojtaba
, p. 240 - 255 (2019/01/30)
The magnetically separable CuFe2O4/Mg(OH)2 nanocomposite was prepared and characterized by FT-IR, XRD, SEM, EDS, and VSM techniques. The synthesized nanoparticles were used as a new and efficient heterogeneous catalyst for the conversion of various epoxides to the corresponding thiiranes with thiourea in water solvent at room temperature. The reactions were completed within 1–3.7 h to give thiiranes in 70–99% yields. The applied CuFe2O4/Mg(OH)2 nanocomposite was separated easily using an external magnet and reused for several times without any considerable loss of activity.
A green method for solvent-free conversion of epoxides to thiiranes using NH4SCN in the presence of NiFe2O4 and MgFe2O4 magnetic nanocatalysts
Eisavi, Ronak,Ahmadi, Fatemeh,Ebadzade, Behrooz,Ghadernejad, Seiran
, p. 614 - 624 (2017/10/03)
Nickel and magnesium ferrite magnetic nanoparticles were fabricated and applied as efficient and reusable catalysts in the solvent-free conversion of various epoxides to the corresponding thiiranes with ammonium thiocyanate under oil bath (60°C) conditions. NiFe2O4 and MgFe2O4 nanoparticles can catalyze the reactions at short times in high to excellent yields. The catalysts can also be recovered easily using an external magnetic field and be reused four times without any significant loss of activity.
A green protocol for rapid and efficient conversion of epoxides to thiiranes using alumina immobilized thiourea at solvent-free conditions
Eisavi, Ronak,Zeynizadeh, Behzad
, p. 65 - 69 (2016/01/25)
Solvent-free conversion of various epoxides to the corresponding thiiranes was carried out successfully with alumina-immobilized thiourea at room temperature. The reactions were completed within 2-9 min to give thiiranes with 83-98% yields. The utilized alumina can be reused for several times without losing its activity.
Magnetically separable nano CuFe2O4: an ef?cient and reusable heterogeneous catalyst for the green synthesis of thiiranes from epoxides with thiourea
Eisavi, Ronak,Ghadernejad, Seiran,Zeynizadeh, Behzad,Mohammad Aminzadeh, Farkhondeh
, p. 537 - 545 (2016/10/03)
The magnetically separable nano CuFe2O4 was prepared and used as an efficient heterogeneous catalyst for conversion of various epoxides to the corresponding thiiranes with thiourea in refluxing ethanol. The reactions were completed within 34?45 min to give thiiranes in 80?95% yields. The utilized nano CuFe2O4 can be reused for several times without losing its activity.
A facile and convenient method for synthesis of thiiranes under mild condition using phase transfer catalyst
Gorjizadeh, Maryam,Afshari, Mozhgan
, p. 1657 - 1660 (2014/05/06)
A mild and efficient process for preparation of thiiranes with KSCN in water at room temperature using a catalytic amount of 1,4- bis(triphenylphosphonium)-2-butene dichloride is described.
Green synthesis of thiiranes from oxiranes under solvent- and catalyst-free conditions
Akhlaghinia, Batool,Rahimizadeh, Mohammad,Eshghi, Hosein,Zhaleh, Sara,Rezazadeh, Soodabeh
experimental part, p. 351 - 361 (2012/08/27)
A simple and efficient method for the conversion of oxiranes to thiiranes using ammonium thiocyanate (NH4SCN) under solvent- and catalyst-free conditions is described. These conditions enable clean and fast conversion of oxiranes to the corresponding thiirane.
A practical and eco-friendly method for conversion of epoxides to thiiranes with immobilized thiourea on CaCO3
Zeynizadeh, Behzad,Baradarani, Mohammad Mehdi,Eisavi, Ronak
experimental part, p. 2208 - 2215 (2012/04/04)
Solvent-free conversion of various epoxides to the corresponding thiiranes was carried out efficiently with immobilized thiourea on CaCO3. The reactions were completed within 1-12 min under oil bath (60 °C-70 °C) conditions to afford thiiranes in 88%-98% yields. Copyright Taylor & Francis Group, LLC.
Zeolite molecular sieve 4: A reusable catalyst for fast and efficient conversion of epoxides to thiiranes with thiourea
Eisavi, Ronak,Zeynizadeh, Behzad,Baradarani, Mohammad Mehdi
experimental part, p. 1902 - 1909 (2011/10/09)
Various epoxides are readily converted to their corresponding thiiranes by thiourea/zeolite molecular sieve 4 system in refluxing MeOH. All reactions were carried out within 12-25 min to give thiiranes in 80%-99% yields. The catalyst saves its catalytic activity for several times at this transformation. Stereospecific conversion of (R)-(+)-styrene oxide to (S)-(+)-styrene episulfide was achieved by this combination system. Taylor & Francis Group, LLC.
