The condensation product of 9, 10-phenanthrenequinone and ethyl acetoacetate

AC Cope, DWH MacDowell

Index: Cope; MacDowell Journal of the American Chemical Society, 1958 , vol. 80, p. 5513,5515

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Citation Number: 10

Abstract

The condensation product of 9, lO-phenanthrenequinone and ethyl acetoacetate and the isomer into which it is coiiverted by acids have been shown to be I11 and IV, respectively, rather than I and I1 as originally proposed by Japp, Klingemann and Streatfeild. Ultraviolet and infrared spectra provided the information essential for the new structural assignments. A number of compounds derived from I11 and IV that were prepared by earlier workers but ...