کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
67495 48484 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly chemoselective acetalization of carbonyl compounds catalyzed by a novel recyclable ammonium triflate-functionalized silica
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Highly chemoselective acetalization of carbonyl compounds catalyzed by a novel recyclable ammonium triflate-functionalized silica
چکیده انگلیسی

A novel ammonium triflate-functionalized silica (NH4+OTf−@SiO2, ATFS) has been prepared and characterized by simple operation from commercially available and relatively cheap starting materials. Various types of aldehydes as well as cyclic ketones were selectively converted to the corresponding 1,3-dioxanes in the presence of ethyl orthoformate, 1,3-propanediol and a catalytic amount of ATFS catalyst via an in situ acetal-exchange process. The catalyst can be recovered and reused for at least six reaction cycles without considerable loss of its reactivity.

Various types of aldehydes as well as cyclic ketones were selectively converted to the corresponding 1,3-dioxanes in the presence of ethyl orthoformate, 1,3-propanediol and a catalytic amount of a novel ammonium triflate-functionalized silica (NH4+OTf −@SiO2, ATFS) via an in situ acetal-exchange process. The catalyst can be recovered and reused for at least six reaction cycles without considerable loss of its reactivity.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 277, Issues 1–2, 16 November 2007, Pages 262–265
نویسندگان
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