An efficient method for the one-pot construction of the 1 H-naphtho [2, 3-c] pyran-5, 10-dione system
K Kobayashi, M Uchida, T Uneda, K Yoneda…
Index: Kobayashi, Kazuhiro; Uchida, Masaharu; Uneda, Tomokazu; Yoneda, Keiichi; Tanmatsu, Miyuki; Morikawa, Osamu; Konishi, Hisatoshi Journal of the Chemical Society. Perkin Transactions 1, 2001 , # 22 p. 2977 - 2982
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Citation Number: 14
Abstract
2-(1-Hydroxyalkyl)-1, 4-naphthoquinones are found to react with pyrrolidino enamines in toluene to give 1H-naphtho [2, 3-c] pyran-5, 10-diones in good yields via a tandem conjugate addition–cyclization sequence, followed by an elimination of pyrrolidine. 2- Hydroxymethyl-1, 4-naphthoquinone and morpholino enamines undergo a similar sequence, without loss of morpholine, to yield 3-morpholino-3, 4-dihydro-1H-naphtho [2, 3 ...
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