1,2-Dichlorobenzene → HCID 12927148, compound

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Reaction Steps

A mixture of diethyl-2-bromoethylphenylphosphonate (2.2 g, 0.00717 mol) in 25 ml. of 1,2-dichlorobenzene was refluxed for 10 hours. The resulting mixture was vacuum distilled. Fractions containing the benzoxaphosphole were collected and then taken up in a hot mixture of benzene-petroleum ether. The mixture was cooled while adding sufficient benzene to prevent oiling out. The cooled mixture yielded 1-ethoxy-1,3-dihydro-2,1-benzoxaphosphole-1-oxide (1.06 g, 75% yield) as colorless crystals having a melting point of 60° C. and the following analysis:

Provenance & Evidence