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Expeditious method for synthesis of symmetrical 1,3-disubstituted ureas and thioureas

机译:快速合成对称的1,3-二取代脲和硫脲的方法

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摘要

Symmetrical 1,3-disubstituted ureas and symmetrical thioureas have been synthesized from corresponding isocyanates, diisocyanates, and isothiocyanates by a new versatile, simple, and quick method in the presence of tertiary amines at room temperature. The method under discussion has several advantages over the existing techniques, as it is simple to carry out, does not require complicated equipment, has a simple workup, and does not use expensive chemicals. Moreover, the yields are almost quantitative. This method has potential in commercial applications.
机译:在室温下,在叔胺存在下,通过一种新的通用,简单和快速的方法,由相应的异氰酸酯,二异氰酸酯和异硫氰酸酯合成了对称的1,3-二取代的脲和对称的硫脲。所讨论的方法相对于现有技术具有多个优点,因为它易于实施,不需要复杂的设备,具有简单的后处理并且不使用昂贵的化学品。而且,产量几乎是定量的。该方法在商业应用中具有潜力。

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