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Stereochemical analysis of leubethanol, an anti-TB-active serrulatane, from Leucophyllum frutescens.
Bioactivity-guided fractionation of the methanolic root bark extract of Leucophyllum frutescens led to the identification of leubethanol (1), a new serrulatane-type diterpene with activity againstExpand
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A Novel Manich Type Reaction Using Aminals in Alkaline Medium
Abstract A one-step synthesis of 1,3-bis[2′ -hydroxy-5, - substituted-benzyl] imidazolidines (3a-d) using a mannich type reaction in basic media is described.
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Total syntheses of five indole alkaloids from the marine bryozoan Flustra foliacea.
A general, efficient, and conceptually new approach to the total syntheses of marine-derived indole alkaloids, including (+/-)-flustramines A (1) and B (2), (+/-)-flustramides A (3) and B (4), andExpand
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Absolute configuration of podophyllotoxin related lignans from Bursera fagaroides using vibrational circular dichroism.
The ethanol extract from the dried exudate of Bursera fagaroides (Burseraceae) showed significant cytotoxic activity in the HT-29 (human colon adenocarcinoma) test system. The extract provided fourExpand
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Terpenoids of Perezia hebeclada
Abstract Perezone (I), hydroxyperezone (IIa), hydroxyperezone monoisovalerate (IIb), α-(IIIa) and β-pipitzols (IVa) and the new compounds α- (Va), β- (VIa) and γ-perezols (Ve) were found in the rootsExpand
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Preparation of cage amine 1,3,6,8-tetraazatricyclo[4.3.1.13,8]undecane
Reaction between cage amine 1,3,6,8-tetraazatricyclo[4.4.1.13,8]dodecane (TATD) and ammonium fluoride affords 1,3,6,8-tetraazatricyclo[4.3.1.13,8]undecane, the missing link betweenExpand
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Thymol derivatives from Calea nelsonii
Abstract Calea nelsonii yielded, besides the two known thymol derivatives 8,9-epoxy-7-isobutyryloxythymol isobutyrate and 10-acetoxy-8,9-epoxythymol isobutyrate, the five new thymol derivativesExpand
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Synthesis and biological evaluation of (-)- and (+)-debromoflustramine B and its analogues as selective butyrylcholinesterase inhibitors.
A series of pyrrolidinoindolines have been synthesized as debromoflustramine B (4a) analogues for their evaluation as cholinesterase inhibitors. Structure-activity studies of this series revealed theExpand
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Antifeedant and Phytotoxic Activity of the Sesquiterpene p-Benzoquinone Perezone and Some of its Derivatives
The sesquiterpene p-benzoquinone perezone (1), isolated from Perezia adnata var. alamani (Asteraceae), and its non-natural derivatives isoperezone (2), dihydroperezone (3), dihydroisoperezone (4),Expand
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Shift reagent 1H NMR study of methoxycoumarins
Attribution complete des deplacements chimiques protoniques de la coumarine, de tous ses derives monomethoxy et de 6 derives dimethoxy sur le cycle aromatique, en utilisant le reactif de deplacementExpand
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