One-pot preparation of 1H-naphtho[2,3-c]pyran-5,10-diones and its application to concise total synthesis of (±)-eleutherin and (±)-isoeleutherin
作者:Kazuhiro Kobayashi、Masaharu Uchida、Tomokazu Uneda、Miyuki Tanmatsu、Osamu Morikawa、Hisatoshi Konishi
DOI:10.1016/s0040-4039(98)01683-9
日期:1998.10
1H-Naphtho[2,3-c]pyran-5,10-dione derivatives, including a natural product (pentalongin), were generally synthesized in one-pot using a tandem conjugate addition-cyclization sequence between 2-(1-hydroxyalkyl)-1,4-naphthoquinones and enamines (or imines). The utility of this method was demonstrated in the synthesis of pyranonaphthoquinone antibiotics, (+/-)-eleutherin and (+/-)-isoeleutherin. (C) 1998 Elsevier Science Ltd. All rights reserved.