Abstract
It is known that reactions of phosphorohalidites with linear a-diimines proceed accordingly [1+4]-cycloaddition mechanism and give rise to 1,3,2-diazaphosphol-r-enes. We have found that 1,2-cyclohexane-diirnines (1) react with alkyldichlorophosphines in the absence of base also resulting in the formation of products of 1,3,2-diazaphosphol-4-ene structure (2,3).
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