A Direct One-Pot Synthesis of Naphtho[2,3-b]furan-4,9-dione Derivatives via C,O-Dialkylation of β-Dicarbonyl Compounds by 2,3-Dichloro-1,4-naphthoquinones - Hu, Hua-You; Zhu, Ye; Wang, Lei; Xu, Jian-Hua (Synthesis, 2005)