22100-66-9Relevant articles and documents
Ni-guanidine@MCM-41 NPs: a new catalyst for the synthesis of 4,4?-(arylmethylene)-bis-(3-methyl-1-phenyl-1H-pyrazol-5-ols) and symmetric di-aryl sulfides
Filian, Hossein,Ghorbani-Choghamarani, Arash,Tahanpesar, Elham
, p. 2673 - 2681 (2019/07/17)
In this work, the surface of mesoporous MCM-41 was modified with guanidine, and then, Nickel particles have become immobilized on its surface (Ni-guanidine@MCM-41NPs). This heterogeneous catalyst has been identified by various techniques including: low-angle X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma, thermal gravimetric analysis and N2 adsorption–desorption measurement isotherms, and its catalytic application was studied in the synthesis of 4,4?-(arylmethylene)-bis-(3-methyl-1-phenyl-1H-pyrazol-5-ol) derivatives and symmetric di-aryl sulfides. The prepared organometallic complex could be isolated, post-reaction, by simple filtration for several consecutive cycles without a notable change in its catalytic activity.
A novel heterogeneous nanocatalyst: 2-Methoxy-1-phenylethanone functionalized MCM-41 supported Cu(II) complex for C-S coupling of aryl halides with thiourea
Hajipour, Abdol R.,Fakhari, Farzaneh,Nabi Bidhendi, Gholamreza
, (2018/02/06)
An environmentally friendly copper-based catalyst supported on 2-Methoxy-1-phenylethanone functionalized MCM-41 was prepared and characterized by FT-IR, FE-SEM, TEM, XRD, EDX, BET and ICP techniques. The catalyst was applied for the C?S cross-coupling reaction of aryl halides with thiourea. Corresponding products were produced in good yields in aerobic conditions. The catalyst could be recovered and recycled for several times.
Metal-free catalytic synthesis of diaryl thioethers under mild conditions
Cao, Xian-Ting,Zhang, Peng-Fei,Zheng, Hui
supporting information, p. 6762 - 6767 (2016/08/10)
A novel method to synthesize diaryl thioethers from aryl halides and carbon disulfide catalyzed by the 1,8-diazabicyclo[5,4,0]undec-7-enium acetate [DBUH][OAc] ionic liquid (IL) under solvent-free conditions has been developed. This metal-free catalytic system displayed high efficiency for coupling aryl halides with CS2 to deliver thioethers. Compared to the conventional methods, no metal catalyst was needed, instead of which the DBU-based ILs played the catalyst and solvent roles simultaneously. Some reactions were carried out under mild conditions (55 °C, 0.5 h), giving moderate to high yields. Moreover, compared with the rare reports, the reaction of the aryl chlorides and fluorides with CS2 could smoothly react in this catalytic system. The products were easily separated from the ILs which could be reused at least three times. The present method provides an efficient and environment-friendly catalytic approach to synthesize diaryl thioethers.
