25101-18-2Relevant articles and documents
Method for catalytically synthesizing diethylene glycol di(methyl) acrylate by calcium glyceroxide
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Paragraph 0039; 0040, (2017/01/02)
The invention discloses a method for catalytically synthesizing diethylene glycol di(methyl) acrylate by calcium glyceroxide, and belongs to the field of fine chemical engineering. (Methyl) alkyl acrylate and diethylene glycol are used as raw materials; a reaction-rectification coupling process is adopted; a copper-wire-net-filled modified rectification column is used; the catalyst calcium glyceroxide is added; enough product purity and yield can be obtained after a simple aftertreatment process. The method overcomes multiple disadvantages of an existing transesterification catalyst, and is high in yield and simple in post-processing. Compared with a conventional transesterification method, the method provided by the invention can improve the total yield and the processing capacity; energy needed for separation is supplied by utilizing reaction heat, so that the energy consumption is decreased, and an investment is reduced. The method provided by the invention is simple and short in process flow; the raw materials are easily obtained; equipment is simple; reaction conditions are easy to control. The method is mild in the reaction conditions and simple in purification and refining processes; a product is stable, is easy to separate, and is not liable to generate a polymerization phenomenon.
Copper(II) triflate as a source of triflic acid: effective, green catalysis of hydroalkoxylation reactions
Tschan, Mathieu J.-L.,Thomas, Christophe M.,Strub, Henri,Carpentier, Jean-Francois
experimental part, p. 2496 - 2504 (2010/04/03)
The hydroalkoxylation of dicyclopentadiene (DCPD) and norbornene (NB) with 2-hydroxyethyl methacrylate (HEMA) for the synthesis of industrially relevant monomers has been investigated with various metal-based Lewis acids and strong Bronsted acids. In the
Synthesis of water-soluble polymethacrylates by living anionic polymerization of trialkylsilyl-protected oligo(ethylene glycol) methacrylates
Ishizone, Takashi,Han, Seok,Okuyama, Syunsuke,Nakahama, Seiichi
, p. 42 - 49 (2007/10/03)
2-[2-[(tert-Butyldimethylsilyl)oxy]ethoxy]ethyl methacrylate (2) and 2-[2-[2-[(tert-butyldimethylsilyl)oxy] ethoxy] ethoxy] ethyl methacrylate (3) were polymerized anionically in THF at -78 °C for 2-24 h. The anionic initiator systems included 1,1-diphenyl-3-methylpentyllithium/lithium chloride and diphenylmethylpotassium/diethylzinc. The polymerization of novel tert-butyldimethylsilyl-protected oligo(ethylene glycol) methacrylates, 2 and 3, proceeded quantitatively in each case. The resulting polymers possessed the predicted molecular weights based on the molar ratios of monomers to initiators, and narrow molecular weight distributions (Mw/Mn 1.1). The stability of the propagating carbanion of poly(2) and poly(3) was ascertained by the quantitative efficiencies of the sequential block copolymerizations using tert-butyl methacrylate (tBMA). Well-defined block copolymers, poly(2)-block-poly(tBMA) and poly(3)block-poly(tBMA), were obtained. The trialkylsilyl protecting groups of poly(2) and poly(3) were quantitatively hydrolyzed using 2 N HC1 in aqueous THF at 0 °C for 2 h to give tailored poly[di(ethylene glycol) methacrylate] and poly[tri(ethylene glycol) methacrylate], respectively. Both polymethacrylates obtained after deprotection were readily soluble in water due to the high polarity of the hydrophilic oligo(ethylene glycol) pendant units with terminal OH functionality.
