Neda Ayashi
Chemistry Department, Collage of Science, Shahid Chamran university of Ahvaz, Ahvaz, Iran
[ 1 ] - An Effective Green Procedure for the Synthesis of Phenacyl Derivatives Catalyzed by Silica-bound 3-{2-[Poly(ethylene glycol)]ethyl}-substituted 1-Methyl-1H-imidazol-3-ium Bromide as a Recyclable Phase Transfer Catalyst under Aqueous Media
The use of a recyclable phase transfer catalyst, SiO2-PEG-ImBr, is demonstrated in a simple and highly efficient synthesis of phenacyl derivatives by nucleophilic substitution reaction of phenacyl halides with different anions in water. Advantages of this system are easy work-up, moderate to good yields, and recyclable catalyst. The catalyst can be recycled and reused several times with no loss...
[ 2 ] - تبدیل ناحیه گزین اپوکسیدها به β- استوکسی الکل ها کاتالیز شده با یک کاتالیزگر انتقال فاز جدید سبز و بازیافت پذیر
یک روش ملایم و مؤثر جدید برای باز کردن حلقه اپوکسیدها با آنیون استات در حضور مقادیر کاتالیزوری سیلیکاژل متصل به پلی اتیلن گلیکول استخلاف شده با 1- متیل ایمیدازولیوم برمید (SiO2-PEG-ImBr) به عنوان یک کاتالیزگر انتقال فاز ناهمگن مؤثر در محیط آبی گزارش شده است. β- استوکسی الکل‌های مختلف با راندمان بالا و ناحیه‌گزینی فوق‌العاده، در مدت زمان کوتاهی به دست آمده است. مهم-ترین مزایای این روش عبارتند از...
[ 3 ] - Regioselective conversion of epoxides to vicinal nitrohydrins catalyzed by silica-bound 3-{2-[poly(ethylene glycol)]ethyl}-substituted 1-methyl-1H-imidazol-3-ium bromide as a green and reusable catalyst under aqueous thermal conditions
An environmentally benign procedure for the synthesis of vicinal nitrohydrins via the regioselective ring opening reaction of epoxides with nitrite anion using silica-bound 3-{2-[poly(ethylene glycol)]ethyl}-substituted 1-methyl-1H-imidazol-3-ium bromide as an effective heterogeneous phase transfer catalyst was described. Short reaction time, high yield of products, simple work-up proc...
[ 4 ] - Regioselective conversion of epoxides to vicinal nitrohydrins catalyzed by silica-bound 3-{2-[poly(ethylene glycol)]ethyl}-substituted 1-methyl-1H-imidazol-3-ium bromide as a green and reusable catalyst under aqueous thermal conditions
An environmentally benign procedure for the synthesis of vicinal nitrohydrins via the regioselective ring opening reaction of epoxides with nitrite anion using silica-bound 3-{2-[poly(ethylene glycol)]ethyl}-substituted 1-methyl-1H-imidazol-3-ium bromide as an effective heterogeneous phase transfer catalyst was described. Short reaction time, high yield of products, simple work-up proc...
Co-Authors