The trianion salt (IV), prepared by reaction of acetylacetone (I) with NaH (II) and excess LDA (III), reacts with benzophenone (V) to give the dihydroxy diketone (VI).
197 ChemInform Abstract The hydrazones (I) are treated with excess LDA to generate trilithium salts which are coupled with the salicylates (II) and directly subjected to acid-promoted ring closure, forming the pyrazolobenzoxazinones (III).
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