Conversion of lapachol to lomatiol: synthesis of novel naphthoquinone derivatives
作者:Kenneth O. Eyong、Kiran Chinthapally、Soundararasu Senthilkumar、Marc Lamshöft、Gabriel N. Folefoc、Sundarababu Baskaran
DOI:10.1039/c5nj01484k
日期:——
Lapachol (1), a naphthoquinone isolated mostly from the plants of the bignoniaceae family has a broad spectrum of biological activities and as a consequence it has been the object of different chemical transformations. Lomatiol (3), another naturally occurring naphthoquinone having structural similarities to lapachol, has been obtained from chemical and microbial transformations of lapachol in very
A mechanistic study on the Hooker oxidation: synthesis of novel indanecarboxylic acid derivatives from lapachol
作者:Kenneth O. Eyong、Manohar Puppala、Ponminor Senthil Kumar、Marc Lamshöft、Gabriel N. Folefoc、Michael Spiteller、Sundarababu Baskaran
DOI:10.1039/c2ob26737c
日期:——
intramolecular aldol reaction of the resulting keto acid. However, the formation of the key Hooker intermediate 3 from lapachol (1) remains ambiguous. The present study has thrown some light on the formation of the key intermediate 3 from lapachol (1) via benzilic acid rearrangement of the corresponding labile o-diquinone intermediate 8 derived from lapachol. The involvement of o-diquinone intermediate 8 in the