Search Results - "Das, Bhupesh C"

New Chiral Isoquinolinium Salt Derivatives from Chiral Primary Amines via Zincke Reaction by Barbier, Denis, Marazano, Christian, Das, Bhupesh C, Potier, Pierre

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Enantioselective Access to Lobelia Alkaloids by Compère, Delphine, Marazano, Christian, Das, Bhupesh C

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Selective Entry to the Dimeric or Oligomeric Pyridinium Sponge Macrocycles via Aminopentadienal Derivatives. Possible Biogenetic Relevance with Manzamine Alkaloids by Kaiser, Alexander, Billot, Xavier, Gateau-Olesker, Alice, Marazano, Christian, Das, Bhupesh C

“…A general entry to dimeric or oligomeric pyridinium macrocycles related to natural products 2 and 3, recently extracted from sponges, is reported. A series of…”
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Stereocontrolled Alkylation of Chiral Pyridinium Salt Toward a Short Enantioselective Access to 2-Alkyl- and 2,6-Dialkyl-1,2,5,6-Tetrahydropyridines by Guilloteau-Bertin, Bérangère, Compère, Delphine, Gil, Laurent, Marazano, Christian, Das, Bhupesh C.

“…Treatment of salts 1a‐b with Grignard reagents gives, after reduction of the resulting unstable dihydropyridines 7, the tetrahydropyridines 8a‐c, with modest…”
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An Enantioselective Access to 1-Alkyl-1,2-Dihydroisoquinolines and 1-Alkyl-, 3-Alkyl-, and 1,3-Dialkyl-1,2,3,4-tetrahydroisoquinolines by Barbier, Denis, Marazano, Christian, Riche, Claude, Das, Bhupesh C, Potier, Pierre

“…New chiral isoquinolinium salt derivatives 1, 2 or 3 have been treated with Grignard reagents to give as major products, 1-substituted 1,2-dihydroisoquinolines…”
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Reactions of Aminopentadienal Derivatives with 5,6-Dihydropyridinium Salts as an Approach to Manzamine Alkaloids Based upon Biogenetic Considerations by Jakubowicz, Karine, Abdeljelil, Kamel Ben, Herdemann, Matthias, Martin, Marie-Thérèse, Gateau-Olesker, Alice, Mourabit, Ali Al, Marazano, Christian, Das, Bhupesh C

“…Recent results from our laboratory have prompted us to introduce a modification of the original Baldwin proposal for the biosynthesis of manzamine alkaloids…”
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Pyridine-Derived Oxazolidines as Chiral 3-Alkyl-4,5-dihydropyridinium and 3-Alkyl-3,4,5,6-tetrahydropyridinium Salt Equivalents by Wong, Yung-Sing, Marazano, Christian, Gnecco, Dino, Génisson, Yves, Chiaroni, Angèle, Das, Bhupesh C

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Structure of iturine A, a peptidolipid antibiotic from Bacillus subtilis by Peypoux, Francoise, Guinand, Micheline, Michel, Georges, Delcambe, Lucien, Das, Bhupesh C, Lederer, Edgar

“…A mixture of iturines extracted from Bacillus subtilis gave, on column chromatography, iturine A, iturine B, and iturine C. Iturine A has the entire antifungal…”
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Lichenysins G, a novel family of lipopeptide biosurfactants from Bacillus licheniformis IM 1307: production, isolation and structural evaluation by NMR and mass spectrometry by Grangemard, I, Bonmatin, J M, Bernillon, J, Das, B C, Peypoux, F

“…A series of 9 lactonic lipopeptide biosurfactants was isolated from Bacillus licheniformis IM 1307 as representatives of the lichenysin group and we propose to…”
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A stereocontrolled alkylation of chiral pyridinium salts with Grignard reagents: synthesis of (+)-normetazocine and (+)-nordextrorphan by Genisson, Yves, Marazano, Christian, Das, Bhupesh C

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Saponins from the stem bark of Filicium decipiens by Lavaud, Catherine, Voutquenne, Laurence, Massiot, Georges, Le Men-Olivier, Louisette, Das, Bhupesh C., Laprévote, Olivier, Serani, Laurent, Delaude, Clément, Becchi, Michel

“…Four new saponins have been isolated from the stem bark of Filicium decipiens and identified as 3- O-{β- d-glucopyranosyl(1 → 2)-β- d-glucopyranosyl}-28-…”
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Stereochemistry of Electrosprayed Ions. Indoloquinolizidine Derivatives by Laprévote, Olivier, Ducrot, Pierre, Thal, Claude, Serani, Laurent, Das, Bhupesh C.

“…Energy‐resolved mass spectrometry (ERMS) using electrospray ionization and in‐source collisional activation is a very promising approach to structural…”
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Lipopeptides with Improved Properties: Structure by NMR, Purification by HPLC and Structure-Activity Relationships of New Isoleucyl-rich Surfactins by Grangemard, Isabelle, Peypoux, Françoise, Wallach, Jean, Das, Bhupesh C., Labbé, Henri, Caille, Anita, Genest, Monique, Maget-Dana, Régine, Ptak, Marius, Bonmatin, Jean-Marc

“…The biosynthesis of bacterial isoleucyl‐rich surfactins was controlled by supplementation of L‐isoleucine to the culture medium. Two new variants, the…”
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Occurrence of D-alanyl-(D)-meso-diaminopimelic acid and meso-diaminopimelyl-meso-diaminopimelic acid interpeptide linkages in the peptidoglycan of Mycobacteria by Wietzerbin, Juana, Das, Bhupesh C, Petit, Jean F, Lederer, Edgar, Leyh-Bouille, Melina, Ghuysen, Jean M

“…Cross-linking between peptide units in the wall peptidoglycan of Mycobacterium smegmatis 21732 ATCC is mediated through D-alanyl-(D)-meso-diaminopimelic acid…”
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Sulfolipid I of Mycobacterium tuberculosis, strain H37RV. Nature of the acyl substituents by Goren, Mayer B, Brokl, Olga, Das, Bhupesh C, Lederer, Edgar

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Hazuntiphyllidine and Anhydrohazuntiphyllidine, Two New Bisindole Alkaloids from Hazunta modesta var. modesta subvar, divaricata by Bui, Anne-Marie, Das, Bhupesh C, Guittet, Eric, Potier, Pierre

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Structure and stereochemistry of hazuntamine, a new bisindole alkaloid from Hazunta modesta var. methuenii subvar. methuenii by BUI, A.-M, DAS, B. C, GUITTET, E, STOVEN, V

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Structure and stereochemistry of divarine: another new bisindole alkaloid from Strychnos divaricans ducke by MUKHERJEE, R, DAS, B. C, KEIFER, P. A, SHOOLERY, J. N

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Structures of bacillomycin D and bacillomycin L peptidolipid antibiotics from Bacillus subtilis by Peypoux, F, Pommier, M T, Das, B C, Besson, F, Delcambe, L, Michel, G

“…The complete structures of bacillomycin D and bacillomycin L were revised by FAB mass spectrometry and by Edman degradation of the derivatives resulting from…”
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Chemical modifications of the vasoconstrictor peptide angiotensin II by nitrogen oxides (NO, HNO2, HOONO) by Ducrocq, Claire, Dendane, Maryvonne, Laprévote, Olivier, Serani, Laurent, Das, Bhupesh C., Bouchemal‐Chibani, Nadia, Doan, Bich‐Thuy, Gillet, Brigitte, Karim, Abdelhak, Carayon, Alain, Payen, Didier

“…Nitric oxide (NO) and angiotensin II are natural regulators of blood pressure. Under aerobic conditions, NO is transformed into its higher oxides (N2O4, NO2,…”
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