Tetrahedron Letters p. 571 - 574 (1992)
Update date:2022-08-11
Topics:
Mueller-Westerhoff, Ulrich T.
Zhou, Ming
Short reflux of an equimolar mixture of N-N′-dimethyl ethylenediamine and diethyl oxalate in ipropanol or diethyl ether leads to 1,4-dimethyl-piperazine-2,3-dione, which is able to react with two equivalent of organolithium or Grignard compounds to form symmetrically substituted α-diones in excellent yields.
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