کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6581496 456336 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solvent free synthesis of cyclic ureas and urethanes by carbonylation method in the basic dicationic ionic liquid catalysts
ترجمه فارسی عنوان
سنتز آزاد حلال اوره های سیکل و اورهان ها با روش کربن لیپتین در کاتالیزورهای مایع اولیه یونی
کلمات کلیدی
سنتز آزاد حلال، مایعات یونیک پایه، کربناته شدن، دی متیل کربنات،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
The direct synthesis of cyclic ureas and urethanes from dimethyl carbonate, diamines or amino alcohols is a tandem reaction that typically involves two steps including amino or hydroxyl proton abstraction and subsequent nucleophilic attack on carbonyl carbon of dimethyl carbonate by anions of basic ionic liquid. In this study, basic dicationic ionic liquids as the metal-free green versatile materials were demonstrated to be an efficient and recyclable bifunctional catalyst in the direct synthesis of ureas and urethanes. Remarkably, the excellent ethylenediamine conversion up to ∼90% and ∼91% cyclic ureas selectivity were achieved by −OH anionic ionic liquid as catalyst at ambient reaction conditions. Furthermore, the ambient reaction conditions, simple workup procedure, wide substrate scope and cost effectiveness are some of the other outstanding features of this protocol that make it economical and sustainable.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 306, 15 December 2016, Pages 826-831
نویسندگان
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