Naphthoquinones are considered privileged structures for anticancer drug molecules. The Heck reaction of 2‐hydroxy‐1,4‐naphthoquinone (lawsone) with 1‐bromo‐3‐methyl‐2‐butene offered easy access to lapachol. Several naturally occurring linear and angular heterocyclic quinoids (α‐lapachone, β‐lapachone, dunnione, and related analogues) were prepared from lapachol. Furthermore, we demonstrated that the
Unexpected transformation of quinones to spirolactones and to naturally occurring naphthalenic compounds
作者:Eufrânio N. da Silva Júnior、Carlos A. de Simone、Adolfo C.B. de Souza、Cleverson N. Pinto、Tiago T. Guimarães、Maria do Carmo F.R. Pinto、Antônio V. Pinto
DOI:10.1016/j.tetlet.2009.01.058
日期:2009.4
natural quinones of the lapachol group have been used as starting points for the preparation of several bioactive heterocyclic compounds. Herein, we announce that lapachones, derivatives of lapachol, under certain conditions in the presence of inorganic reagents give unexpected products, spirolactones and naphthalenic derivatives, nordihydrolapachenone and tetrahydrotectol, both naturallyoccurring compounds