1. An efficient method for the one-pot construction of the 1H-naphtho[2,3-c]pyran-5,10-dione system Kazuhiro Kobayashi,Masaharu Uchida,Tomokazu Uneda,Keiichi Yoneda,Miyuki Tanmatsu,Osamu Morikawa,Hisatoshi Konishi J. Chem. Soc. Perkin Trans. 1 2001 2977