- Hentriacontanyl eicosanoate ester from Parthenium hysterophorus Linn. and its antimicrobial activity
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Aerial parts of Parthenium hysterophorus Linn. on chemical investigation afforded a new aliphatic ester hentriacontanyl eicosanoate along with stigmasterol, parthenin, isoparthenin and coronopilin. The structures of isolated compounds were ascertained using various spectral (IR, 1H, 13C NMR, MS) techniques and hentriacontanyl eicosanoate has been evaluated for its antibacterial activity against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and antifungal activity against Aspergillus niger, Candida albicans and Fusarium oxysporum.
- Madan, Harsha,Sharma, Sharda
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p. 1033 - 1036
(2012/04/04)
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- Organoboranes for synthesis. 13. Simple, efficient syntheses of long-chain alcohols and carboxylic acids
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General, convenient and simple syntheses of long straight chain alcohols and carboxylic acids were developed utilizing organoborane chemistry. One of the methods entails the thermal isomerization of long-chain alkyldicyclohexylboranes, followed by oxidation. An alternative procedure for the preparation of long-chain alcohols involves the KAPA isomerization of internal alkynes to the terminal derivative, followed by dihydroboration with 9-BBN and oxidation. Alternatively, the terminal alkyne can be oxidised directly to the carboxylic acid. In another strategy, the C30-alcohol triaxontanol was prepared by employing high pressure carbonylation of a borane intermediate.
- Brown, Herbert C.,Iyer, Ramakrishnan R.,Bhat, Narayan G.,Racherla, Uday S.,Brown, Charles A.
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p. 9187 - 9194
(2007/10/02)
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- A New Synthesis of Long Chain Acid Esters and Carbinols
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A versatile synthesis of difficulty accessible long chain acid esters and carbinols is described.The synthesis involves acylations at 2- and 5-positions of thiophene.Thioketalation of the resulting ketoesters followed by Raney nickel desulfurization yield acid esters which on LAH reduction give the corresponding carbinols.
- Rao, S. Jagadishwar,Bhalerao, U. T.,Tilak, B. D.
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p. 208 - 211
(2007/10/02)
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- ALIPHATIC CONSTITUENTS FROM DUBOISIA MYOPOROIDES
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Four new compounds, isolated from the leaves and stem of Duboisia myoproides have been characterized as 6-methyldotriacontane, hentriacontanyl tetratriacontanoate, 3-hydroxydotriacontan-28-one and 4-pentatriacontanone, respectively, by spectral data and chemical studies.Key Word Index - Duboisia myoporoides; Solanaceae; leaves and stems; 6-methyldotriacontane; hentriacontanyl tetratriacontanoate; 3-hydroxydotriacontan-28-one; 4-pentatriacontanone.
- Shukla, Yogendra N.,Thakur, Raghunath S.
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p. 799 - 802
(2007/10/02)
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