A New Synthesis of Indigo
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Prof. Dr. E. Ziegler; Dr. Th. Kappe
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Article
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1964
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John Wiley and Sons
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English
β 129 KB
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compound; however, Karplus' rule [5] does not strictly apply to four-membered rings. In boiling xylene, both (3) and (4) are converted almost quantitatively into the same acyclic acylpropenyl propyl ether (5). The structure of (5) was determined from elemental analysis, N M R and infrared spectra, a