140147-76-8Relevant articles and documents
LIGNANS FROM POLAR EXTRACTS OF JUNIPERUS THURIFERA
Feliciano, Arturo San,Corral, Jose M. Miguel del,Lopez, Jose L.,Pascual-Teresa, Beatriz de
, p. 267 - 270 (1992)
Three new natural lignans, methyl deoxypodophyllotoxinate, podophyllotoxinic acid and 7β-hydroxydihydrosesamin, 11 known lignans and two cinnamyl alcohols were isolated and identified from a chloroform extract of Juniperus thurifera leaves.Assignment of the (13)C NMR spectrum of β-methyl peltatin B was also performed through direct and long-range heteronuclear 2D NMR analysis, amending previous assignments. Key Word Index - Juniperus thurifera; Cupressaceae; methyl deoxypodophyllotoxinate; podophyllotoxinic acid; 7β-hydroxydihydrosesamin; lignans.
Preparation and cytotoxicity of podophyllotoxin derivatives lacking the lactone ring
Gordaliza, Marina,Castro, M. Angeles,Miguel del Corral, Jose M.,Lopez-Vazquez, M. Luisa,Garcia, Pablo A.,Feliciano, Arturo San,Garcia-Gravalos, M. Dolores,Broughton, Howard
, p. 15743 - 15760 (2007/10/03)
Several cyclolignans lacking of the Iactone moiety can easily be prepared from naturally occurring lignans such as podophyllotoxin and deoxypodophyllotoxin by simple chemical transformations. Their cytotoxicity has been studied in four tumoral cell lines. Most of the compounds show similar effects in all the neoplastic systems tested, except the 3 aldehyde 9 (methyl 9-deoxy-9-oxo-α-apopicropodophyllate) and the hydrazones 16 and 17 which show a highly selective cytotoxicity towards HT-29 human colon carcinoma. Additionally, several molecular modeling studies have been done with aldehyde 9 and the correspnding saturated aldehyde 13 in comparison with podophyllotoxin.
Synthesis of (+/-)-4-Deoxypodophyllotoxin, (+/-)-Podophyllotoxin and (+/-)-Epipodophyllotoxin
Jones David W.,Thompson, Adrian M.
, p. 2541 - 2548 (2007/10/02)
6,7-Methylenedioxy-1-(3',4',5'-trimethoxyphenyl)-2-benzopyran-3-one 1 and dimethyl fumarate in acetonitrile give mostly the C-2 exo-CO2Me adduct 4 which is transformed in four steps into epipodophyllotoxin 10a.Attempted addition of dimethyl maleate to 1 p
Regioselective Suprafacial 1,5-Hydrogen Shifts in o-Quinodimethanes; a Route to 4-Deoxypodophyllotoxin
Jones, David W.,Thompson, Adrian M.
, p. 1095 - 1096 (2007/10/02)
The o-quinodimethane intermediate (4a) with cis-CO2Me groups undergoes regioselective 1,5-hydrogen shift to the cis-dihydronaphthalene (5a) whilst its trans-isomer (9a) gives both 1,5-hydrogen shift products (6a) and (7a); (5a) is readily converted into 4
A Stereo- and Regiocontrolled Synthesis of Podophyllum Lignans
Rodrigo, Russell
, p. 4538 - 4540 (2007/10/02)
A Diels-Alder adduct of an isobenzofuran (generated in situ) and dimethyl acetylenedicarboxylate is converted by a series of controlled reductions and isomerizations to the lignans deoxy- and isodeoxypodophyllotoxin in seven stages.