Synthesis of Novel 4,6-Diazaspirohex-1-en-5-ones by the Reaction of Diphenylcyclopropenone Oxime with Isocyanates

Article abstract of DOI:10.1246/cl.1987.659

Diphenylcyclopropenone oxime hydrochloride (3) was prepared in an 83 percent yield from diphenylcyclopropenone and hydroxylamine hydrochloride in methanol.The salt 3 reacted with alkyl and aryl isocyanates in the presence of triethylamine to yield 1:2 add