Dicyclohexylcarbodiimide → N,N'-Dicyclohexylurea

Participants

Reaction Steps

1-hydroxy-1-p-tolylethylphosphonous acid (0.2 g., 0.01M), 1-chloro-2-propanol (0,094 g., 0.01M) and dimethylaminopyridine (0.01 g) are stirred in tetrahydrofuran (5 ml.) at 5° C. Dicyclohexylcarbodiimide (0.23 g., 0.001M) is added portionwise over 1 hour. On completion of the reaction (monitored by 31P NMR) ether (10 ml) is added and the dicylohexylurea formed is filtered off. Evaporation of the filtrate gives an oil which is purified by chromatography on silica using 5% methanol in chloroform as eluant. There is obtained 1-chloromethylethyl (1-hydroxy-1-p-tolylethyl)phosphinate.

Provenance & Evidence