CARBODIIMIDES: PART III. (A) A NEW METHOD FOR THE PREPARATION OF MIXED ESTERS OF PHOSPHORIC ACID. (B) SOME OBSERVATIONS ON THE BASE-CATALYZED ADDITION OF ALCOHOLS TO CARBODIIMIDES
Open Access
- 1 March 1954
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 32 (3) , 227-234
- https://doi.org/10.1139/v54-030
Abstract
The preparation of a number of N,N′-di-p-tolyl-O-alkyl pseudourea ethers through the alkoxide catalyzed exothermic addition of alcohols to di-p-tolyl carbodiimide is described. Triethyl amine is not effective as a catalyst for such additions. Dicyclohexylcarbodiimide has been found not to undergo such additions at all.The N,N′-diaryl-O-alkyl pseudourea ethers decompose in the presence of mono-and disubstituted hydrogen phosphates to form the diaryl urea and the neutral tertiary phosphates in excellent yield. Several mixed esters of phosphoric acid have been prepared by this method.Keywords
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