The Dehydrochlorination of Allophanoyl Chlorides. A New Synthesis of Isocyanates

AAR Sayigh, JN Tilley, H Ulrich

Index: Sayigh,A.A.R. et al. Journal of Organic Chemistry, 1964 , vol. 29, p. 3344 - 3347

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Citation Number: 13

Abstract

The thermal dehydrochlorination of N, X'-dialkylallophanoyl chlorides afforded isocyanates in high yield. While X, S'-dialkylallophanoyl chlorides are virtually unaffected by base, the cyclic allophanoyl chlorides (2-imidazolidinone-N-carbonyl chlorides) could be dehydrochlorinated to the corresponding diisocyanatee at room temperature using a tertiary amine. The influence of various catalysts on the thermal decomposition of allophanoyl ...