Expeditious Method for Synthesis of Symmetrical 1,3‐Disubstituted Ureas and Thioureas
作者:Shahnaz Perveen、Syed M. Abdul Hai、Rashid A. Khan、Khalid Mohammed Khan、Nighat Afza、Tahira B. Sarfaraz
DOI:10.1081/scc-200061656
日期:2005.6.1
Abstract 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
摘要 在室温下,在叔胺的存在下,通过一种通用、简单、快速的新方法,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 1,3-二取代脲和对称硫脲。所讨论的方法与现有技术相比具有几个优点,因为它易于实施,不需要复杂的设备,后处理简单,并且不使用昂贵的化学品。此外,产量几乎是定量的。这种方法在商业应用中具有潜力。