Phytochemistry p. 1105 - 1112 (1995)
Update date:2022-08-15
Topics:
Lajide, Labunmi
Escoubas, Pierre
Mizutani, Junya
A heaxne extract of xylopia aethiopica fruits and an aqueous methanol extract of the seeds were studied for termite antifeedant activity against workers of the subterranean termite, Reticullitermes speratus.The crude extract, at1percent exhibited strong antifeedant activity in a choice filter paper disk bioassay.Bioassay-directed fractionation led to the isolation and identification of six ent-kaurane diterpenes in the hexane extract.Feeding deterrent activity varied significantly with the structures when the compounds were tested at concentrations ranging from 5000 ppm (40 μg cm-2) to 100 ppm (0.824 μg cm-2). (-)-Kaur-16-en-19-oic acid had the strongest termite antifeedants activity among the ent-kauranes isolated.Two phenolic amides and four lignanamides were also isolated from the aqueous methanolic extract of seeds.E-3-(4-hydroxy-3-methoxyphenyl)-N-2-<4-hydroxyphenylethyl>2-propenamide was more active than E-3 (3,4-dihydroxyphenyl)-N-2-<4-hydroxyphenylethyl>2-propenamide, whilst grossamide and the new lignanamide, demethylgrossamide, as well as (-)-cannabisins B and D exhibited potent feeding deterrent activity at 5000 ppm.The identity of these compounds was established by spectroscopic analysis and synthesis.Two synthetic amides, E-3-(3,4-methylenedioxyphenyl)-N-2-<4-hydroxyphenylethyl> propenamide and E-3-(3,4-methylenedioxyphenyl)-N-2-
Fuxin Jintelai Fluorin Chemical Co., Ltd.
Contact:+86-0418-8229599
Address:, 7th Huagong Road, Fluorine industry development zone (Yimatu Town,Fumeng County),Fuxin City, Liaoning Province, China
JinTan Pingsheng Chemical Co.,Ltd
Contact:+86-519-82828200
Address:NO.11Danfengxilu Road,Jintan City,Jiangsu,China
WENZHOU M&C FOREIGN TRADE CO.,LTD.
Contact:+86-577-88862917
Address:No.8 Liming West Road,Wenzhou,zhejiang,China
Daqing E-shine Chemical Co.,LTD
Contact:0086-024-31285112
Address:Hongweiyuan area, Ranghulu district
HANGZHOU TOYOND BIOTECH CO., LTD
Contact:+86-571-86965177
Address:No. 189, Fengqi East Road, Hangzhou, China
Doi:10.1016/S0040-4039(01)99813-2
(1983)Doi:10.1002/chem.201500839
(2015)Doi:10.1039/c5cc01522g
(2015)Doi:10.1021/ol7022054
(2007)Doi:10.1021/tx990078x
(1999)Doi:10.1039/d0ra01009j
(2020)