Synthesis and antitumor activity of 4-hydroxycoumarin derivatives
作者:Jae-Chul Jung、Ji-Ho Lee、Seikwan Oh、Jae-Gon Lee、Oee-Sook Park
DOI:10.1016/j.bmcl.2004.09.009
日期:2004.11
A series of 4-hydroxycoumarinderivatives was prepared and evaluated for antitumor activity. The key fragments were 2a-c, 5c, 12b, 13b, 17, and 18 which were prepared via dianion ring cyclization, Friedel-Crafts acylation, and Reformatsky reaction. Compound 20b showed the most potent antitumor activity among the total 12 derivatives and compounds 19a and 19b exhibited efficacy comparable to etoposide
Improved synthesis for the rodenticides, diphenacoum and brodifacoum
作者:Pieter S. van Heerden、Barend C. B. Bezuidenhoudt、Daneel Ferreira
DOI:10.1039/a607269k
日期:——
An improved synthesis of the 3-[3-(p-substituted
phenyl)-1,2,3,4-tetrahydro-1-napththyl]-4-hydroxycoumarins, diphenacoum
and brodifacoum, is described. The process is primarily based on the
formation of one of the crucial bonds in the carbon backbone using
organocopper methodology, and on the coupling of the 4-hydroxycoumarin
moiety to the 3-biphenyl tetralin unit under strongly acidic
conditions.