19957-41-6Relevant articles and documents
Cyclopropenone Oximes: Preparation and Reaction with Isocyanates
Yoshida, Hiroshi,Ohtsuka, Hideki,Yoshida, Keisuke,Totani, Yoshiyuki,Ogata, Tsuyoshi,Matsumoto, Kiyoshi
, p. 4347 - 4352 (2007/10/02)
2,3-Diphenyl-, 2-methyl-3-phenyl-, and 2-methyl-3-(4-methylphenyl)cyclopropenone oxime hydrochlorides (3) were prepared in good yields from the corresponding cyclopropenones and hydroxylamine hydrochloride in methanol.The salts 3 reacted with alkyl and aryl isocyanates in the presence of triethylamine to afford 1 : 2 addition products 4,6-diazaspirohexenones in moderate yields.In contrast, acetone, acetophenone, and cyclohexanone oximes reacted with twice excess of methyl isocyanates to give linear 1 : 1 addition products and benzophenone oxime yielded only 1 : 1 addition product.