Manobjyoti Bordoloi

Naturally occurring cadinenes

Abstract Naturally occurring cadinenes appearing in the literature up to the end of 1986 have been reviewed.

Absolute stereochemistry of the insect antifeedant cadinene from eupatorium adenophorum

Abstract Chemical correlation studies and application of Horeaus method establish the absolute stereochemistry of the major cadinene from E . adenophorum as shown in {=1}.

A meliacin from Chisocheton paniculatus

Abstract A new antifungal meliacin type compound, 1,2-dihydro-6α-acetoxyazadirone has been isolated from the fruits of Chisocheton paniculatus , and its structure and stereochemistry determined.

Absolute stereochemistry of the cadinenes from eupatorium trapezoideum

Abstract Chemical examination of Eupatorium trapezoideum has furnished five cadinenes 1 a, 2 a, 2 b, 4 a & 5 and a degraded cadinene 3 a whose stereostructures are presented in this paper. The absolute stereochemistry of the major component 1 a has been determined by application of Horeaus method as well as chemical correlation studies and has been confirmed by X-ray analysis of 1 f thus suggesting that it belongs to the amorphane group.

Cadmium chloride-magnesium-water : a new system for reduction of various organic functionalities

Abstract Cadmium chloride-magnesium-THF-water efficiently reduced aldehydes and ketones to their corresponding alcohols, epoxide to mono-alcohol, benzyl halide to toluene, acid chloride to aldehyde and hydrolyzed thioketal to corresponding ketones.

Biomimetic transformation of a guaianolide to a pseudoguaianolide

Abstract The long awaited transformation of the guaianolide skeleton to the pseudoguaianolide skeleton ( 18 → 6a ) has been achieved.

Biomimetic transformation of a guaianotide to a pseudoguaianolide

Abstract The long awaited transformation of the guaianolide skeleton to the pseudoguaianolide skeleton ( 10 → 34 ) has been achieved. During this study two new carbon skeletons in sesquiterpene lactones have been reported.

Tin(II) chloride dihydrate reduction of β,γ -unsaturated nitro-alkenes

Abstract β,γ -Unsaturated nitro-alkenes have been converted into α,β -unsaturated ketones in good yield by tin(II) chloride dihydrate in tetrahedrofuran.