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Antimycobacterial activity of prenylated xanthones from the fruits of Garcinia mangostana.
Prenylated xanthones, isolated from the fruit hulls and the edible arils and seeds of Garcinia mangostana, were tested for their antituberculosis potential. Alpha- and beta-mangostins and garcinone BExpand
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Bioactive carbazole alkaloids from Clausena wallichii roots.
Four new carbazole alkaloids, clausenawallines C-F (1-4), along with 18 known compounds (5-22) were isolated from the roots of Clausena wallichii. Compounds 3, 9, and 22 exhibited significantExpand
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Antibacterial carbazole alkaloids from Clausena harmandiana twigs.
Three new carbazole alkaloids, harmandianamines A-C (1-3), together with fifteen known compounds (4-18) were isolated from the twigs of Clausena harmandiana. The structures were elucidated byExpand
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Antibacterial dihydrobenzopyran and xanthone derivatives from Garcinia cowa stem barks.
Two new compounds, garciniacowol (1) and garciniacowone (2) along with 15 knowncompounds were isolated from the stem barks of Garcinia cowa. Their structures weredetermined by intensive spectroscopicExpand
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Clausenawallines G-K, carbazole alkaloids from Clausena wallichii twigs.
Five carbazole alkaloids, clausenawallines G-K (1-5), along with 12 known alkaloids (6-17) were isolated from the twigs of Clausena wallichii. Their structures were established using spectroscopicExpand
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Naturally occurring prenylated coumarins from Micromelum integerrimum twigs
A phytochemical investigation of secondary metabolites from Micromelum integerrimum was reported. Two new prenylated coumarins named as hydramicromelin D (1) and integerrimelin (2) were isolatedExpand
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Ph3P/I2-Mediated Synthesis of 3-Aryl-Substituted and 3,4-Disubstituted Coumarins
Ph3P/I2–Et3N-mediated one-pot two-step esterification–cyclization toward 3-aryl coumarins and 3-aryl-4-methylcoumarins is reported. The reaction of a variety of aryl acetic acids containing steric orExpand
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Rearranged benzophenones and prenylated xanthones from Garcinia propinqua twigs.
The first phytochemical investigation of Garcinia propinqua has led to the isolation and identification of three new compounds, including two rearranged benzophenones, doitunggarcinones A (1) and BExpand
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Generation of ortho-quinone methides by p-TsOH on silica and their hetero-Diels-Alder reactions with styrenes.
2-Arylchromans were readily prepared from the hetero-Diels-Alder reactions of styrenes with the ortho-quinone methides (o-QMs) which, in turn, were generated by treating the MOM-protectedExpand
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An efficient mechanochemical synthesis of amides and dipeptides using 2,4,6-trichloro-1,3,5-triazine and PPh3
A rapid, facile, and efficient mechanochemical synthesis of amides from carboxylic acids has been developed through an in situ acid activation with 2,4,6-trichloro-1,3,5-triazine and a catalyticExpand
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