作者:Zsuzsa M. Jászay、Imre Petneházy、László Töke、Béla Szajáni
DOI:10.1055/s-1987-27992
日期:——
A new method is described for the preparation of carbodiimides by dehydration of ureas with arenesulfonyl chlorides under solid-liquid phase-transfer catalytic (PTC) conditions using solid potassium carbonate as a base and a lipophilic quaternary ammonium salt as a catalyst. The method is generally applicable for the synthesis of disubstituted carbodiimides, but is especially useful for unsymmetrically substituted carbodiimides. The basic carbodiimides prepared were identified in the form of the more stable, crystalline quaternary salts.
本文介绍了一种以固体碳酸钾为碱、亲油性季铵盐为催化剂,在固液相转移催化(PTC)条件下通过脲与异壬磺酰氯脱水制备碳二亚胺的新方法。 该方法一般适用于合成二取代碳二亚胺,但尤其适用于非对称取代的碳二亚胺。所制备的碱性碳二亚胺以更稳定的结晶季铵盐的形式进行了鉴定。