Synthesis of simple analogues of methyllycaconitine—an efficient method for the preparation of the N-substituted anthranilate pharmacophore
作者:David Barker、Margaret A Brimble、Malcolm D McLeod
DOI:10.1016/j.tet.2004.05.024
日期:2004.7
The synthesis of several A and AE ring analogues of the alkaloid methyllycaconitine is reported. The key 2-(2″-methylsuccinimido)benzoate ester pharmacophore is introduced using an efficient two step procedure. Esterification of the alcohol precursors with N-(trifluoroacetyl)anthranilic acid under Steglich conditions followed by sodium borohydride mediated cleavage of the trifluoroacetyl group affords
Structure-activity relationships of fungicidal N-benzoylanthranilic esters.
作者:Osamu KIRINO、Shigeo YAMAMOTO、Toshiro KATO
DOI:10.1271/bbb1961.44.2149
日期:——
The antifungal activity of 37 N-(methoxy-substituted benzoyl)anthranilic esters was tested on the powdery mildew of barley caused by Erysiphe graminis by the pot test. Among the methyl N-(methoxy-substituted benzoyl)anthranilates tested, 3, 4-dimethoxybenzoyl derivative exhibited the highest activity. The variation in fungicidal activity of N-(3, 4-dimethoxy-benzoyl)anthranilic esters was shown to be related with variation in hydrophobicity and the electronic property of the alcohol moiety of the ester. The branching at the α-position of the alcohol moiety of the ester was detrimental to the activity.
A high yielding synthesis of anthranilate esters from sterically hindered alcohols
作者:David Barker、Malcolm D McLeod、Margaret A Brimble、G.Paul Savage
DOI:10.1016/s0040-4039(00)02327-3
日期:2001.2
and operationally simple synthesis of anthranilate esters derived fromprimary, secondary and tertiary alcohols is reported. Esterification of the alcohol with N-(trifluoroacetyl)anthranilic acid under Steglich conditions, followed by sodium borohydride mediated cleavage of the trifluoroacetyl group affords the anthranilate ester. This new method has application in the synthesis of the ester sidechains
Acylation of lycoctonine: Semi-synthesis of inuline, delsemine analogues and methyllycaconitine
作者:Ian S. Blagbrough、Philippa A. Coates、David J. Hardick、Terence Lewis、Michael G. Rowan、Susan Wonnacott、Barry V.L. Potter
DOI:10.1016/s0040-4039(00)78477-2
日期:1994.11
Lycoctonine has been acylated to afford sequentially inuline, delsemine analogues and methyllycaconitine using isatoic anhydride followed by S-(−)-methylsuccinic anhydride. This protocol is a rapid, facile method for the regiospecific introduction of the anthranilate ester moiety found in potent nicotinic acetylcholine receptor antagonists.