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Abstract
Phenanthrenequinonemonoxime (1) reacts with trimethyl-, triethyl-, and triisopropyl phosphites to give the corresponding 1,3,2-oxazaphospholes (3a-c). The reaction of acenaphthenequinonemonoxime (2) with the same phosphite reagents afforded acenaphthenequinone-ketazine (5) in each case. Structural assignments were based upon chemical as well as spectroscopic evidence.