Tetracycline studies. Part IV. Some novel cyclisations through benzophenone carbanions, including a new synthesis of anthraquinones
- 1 January 1973
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- p. 2853-2861
- https://doi.org/10.1039/p19730002853
Abstract
A tricyclic amide (2) related to 6-methylpretetramid (1), and several anthraquinones, including the natural products emodin (18) and physcion (19), have been synthesised in excellent yield through a base-catalysed ring closure reaction employing appropriately substituted 2-cyanomethyl-2′-methoxybenzophenones. This is a procedure of wide applicability for the synthesis of anthraquinones.Keywords
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