Ultrasonic and Microwave Effects on the Benzamide/Sulfuryl Chloride Mediated Benzoylation of Benzene Derivatives under Vilsmeier-Haack Conditions
Ultrasonic and Microwave Effects on the Benzamide/Sulfuryl Chloride Mediated Benzoylation of Benzene Derivatives under Vilsmeier-Haack Conditions
عنوان فارسی :
Ultrasonic and Microwave Effects on the Benzamide/Sulfuryl Chloride Mediated Benzoylation of Benzene Derivatives under Vilsmeier-Haack Conditions
عنوان انگلیسی :
Ultrasonic and Microwave Effects on the Benzamide/Sulfuryl Chloride Mediated Benzoylation of Benzene Derivatives under Vilsmeier-Haack Conditions
چکیده انگلیسی:
Benzamide/ Sulfuryl Chloride (SO2Cl2) reagent has been developed as a Vilsmeier- Haack(VH) reagent for benzoylation of aromatic compounds by using the conventional and ultrasonic sonication (US), and microwave (MW) conditions. Benzoylation is much more competent and faster than the analogous VH ((Benzamide/ POCl3) or (Benzamide/ SOCl2)) reagents and afforded benzoyl derivatives in good yields. Reaction times are moderately less than those observed with [Benzamide/ POCl3] and (Benzamide/ SOCl2) reagents. Reaction times are far less in microwave assisted (MWAR) reactions than ultrasonically assisted (USAS) reactions , which in turn are less than the conventional method with a decreasing trend: MWAR (seconds) << Sonication (minutes) << conventional (hrs). The highly remarkable rate accelerations in MW assisted reactions are attributed to the bulk activation of the molecules; while US assisted reactions could be accounted for cavitation effects.
خبرنامه
برای ثبت نام در خبرنامه و دریافت خبرنامه ایمیل خود را وارد نمایید.
