نوع مقاله : مقاله علمی پژوهشی
نویسندگان
1 دانشگاه شهید چمران اهواز، دانشکده علوم، گروه شیمی
2 دانشگاه پیام نور مرکز اردکان
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
A new mild and efficient procedure for the ring opening of epoxides by acetate anion in the presence of catalytic amounts of silica-bound polyethylene glycol substituted 1-methylimidazolium bromide, SiO2-PEG-ImBr, as an effective heterogeneous phase transfer catalyst in aqueous media is developed. A variety of β-acetoxy alcohols are obtained in high yields with excellent regioselectivity in short reaction times. The remarkable features of this procedure are improved yields, high regioselectivity, small quantity of catalyst, easy work-up, ease of recyclability of catalyst and environmentally friendliness. The recycled catalyst could be reused over four times with almost no loss of catalytic activity.
A new mild and efficient procedure for the ring opening of epoxides by acetate anion in the presence of catalytic amounts of silica-bound polyethylene glycol substituted 1-methylimidazolium bromide, SiO2-PEG-ImBr, as an effective heterogeneous phase transfer catalyst in aqueous media is developed. A variety of β-acetoxy alcohols are obtained in high yields with excellent regioselectivity in short reaction times. The remarkable features of this procedure are improved yields, high regioselectivity, small quantity of catalyst, easy work-up, ease of recyclability of catalyst and environmentally friendliness. The recycled catalyst could be reused over four times with almost no loss of catalytic activity.
کلیدواژهها [English]
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