A novel and efficient strategy for the synthesis of various carbamates using carbamoyl chlorides under solvent-free and grinding conditions using microwave irradiation
作者:Hassan Zare、Mohammad Mehdi Ghanbari、Marzieh Jamali、Abdollah Aboodi
DOI:10.1016/j.cclet.2012.06.025
日期:2012.8
different alcohols, phenols, diols and this intermediate at room temperature with grinding and in solvent-free conditions under microwave irradiation. The presence of various safe bases is shown to be effective in reducing the reaction times, increasing the yields and easing purification. The present method does not involve any hazardous phosgene.
我们提出了一种高效,快速,简单的策略,可在溶液中和无溶剂条件下,使用化学计量的碳酸二(三氯甲基)酯(BTC)从仲胺生成中间体氨基甲酰氯,并具有优异的收率。所获得的结果表明,无论是否使用碱,收率都有所提高。最后,通过与多种不同的醇,酚,二醇和该中间体在室温下经研磨和在无溶剂条件下于微波辐射下反应,开发了一种高效,快速合成各种氨基甲酸酯衍生物的方法。各种安全碱的存在被证明在减少反应时间,增加产率和简化纯化方面是有效的。本方法不涉及任何有害的光气。