Highly efficient acetalization and ketalization catalyzed by nano-kaolin/BF3/Fe3O4 under solvent-free condition

سال انتشار: 1398
محل انتشار: بیست و هفتمین کنفرانس شیمی آلی ایران
کد COI اختصاصی: ISOC27_456
زبان مقاله: انگلیسی
تعداد مشاهده: 326

نویسندگان

Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran

چکیده

The protection of carbonyl groups plays an important role in multi-step organic synthesis of compounds with multiple functional groups. Cyclic acetals and ketals are the most well-established and frequently used protective strategies for the carbonyl groups.1 In addition, many acetals and ketals have wide applications in industrial manufacturing such as cosmetics, foods and fragrances, etc.2 The most general method for the synthesis of acetals and ketals is the reaction of carbonyl compounds with an alcohol or diol. Traditionally, acidic catalysts like protic acid, Lewis acids, and heteropoly acids3 were used to synthesize acetals or ketals. However, those methods suffered from several drawbacks such as corrosion, tedious work-up, environmental pollution and non-recoverability of catalysts. To solve these problems, a variety of solid acids, which were prepared by immobilization of acidic catalysts have been investigated.4 Recently, transition metal complexes have been used to catalyze the acetalization and ketalization of carbonyl compounds.5In this study, we report our results for the acetalization and ketalization of carbonyl compounds with diols under solvent-free conditions in the presence of nano-kaolin/BF3/Fe3O4 as a magnetic catalyst (Fig.1). The advantages of this study involve in use of solvent-free condition, an easy experimental work-up system, rapidity, recyclable catalyst and green process.

کلیدواژه ها

Acetalization, Ketalization, Nano-kaolin/BF3/Fe3O4, Solvent free.

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.