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New PDF release: Bioorganic Marine Chemistry

By Ronald J. Quinn (auth.), Professor Paul J. Scheuer (eds.)

ISBN-10: 3642483461

ISBN-13: 9783642483462

ISBN-10: 3642483488

ISBN-13: 9783642483486

Burgeoning study into marine usual items in the past twenty years has in no small degree been because of an heightened and world-wide curiosity within the ocean, to the improvement of latest subtle computer-driven instrumentation, and to significant advances in separation technology. natural chemists were totally conscious that procedures in residing structures ensue in an aqueous medium. however, the chemists who've really good within the research of small molecules have stumbled on it expedient to take advantage of natural instead of aqueous solvents for the isolation and manipulation of secondary metabolites. The emergence of latest chromatographic innovations, the promise of profitable effects, let alone the relevance of polar molecules to lifestyles itself, have contributed to a brand new information of the significance of natural chemistry in an aqueous medium. the 1st bankruptcy in quantity 2 of Bioorganic Marine Chemistry displays the becoming curiosity and obstacle with water-soluble com­ kilos. Quinn, who pioneered the separation of such molecules, has contributed a evaluate which heavily hyperlinks options with effects and is predicated on functional event. the second one bankruptcy, through Stonik and Elyakov, examines the substantial chemical literature of the phylum Echinodermata - over one fourth of it in trouble available Russian language guides. The Soviet authors assessment the information for his or her suitability as chemotaxonomic markers.

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The extract (220 g) in water (1 L) was passed through a column of Amberlite XAD-2 (1 kg). 03 g ofmaterial. The methanol fraction was subjected to gel permeation chromatography on Sephadex LH-60 in methanol/water (2: 1). The steroid fraction was rechromato graphed on Sephadex LH-20 in methanol, followed by preparative HPLC on a C-18 ,u-Bondapak column with methanol/water (6S:3S) to yield three polyhydroxylated sterols 41, 42 and 43 [S8]. , Chemistry of Aqueous Marine Extracts Isolation Techniques I 0 ~ ,f o 0 I 0 II "0 II OJ U N I I 0 0 I 0 I II II "- >.

Linckia laevigata contains thornasteroside A (48), marthasteroside A (44), ophidianoside F (52), maculatoside (49) and laevigatoside (53) [62]. Protoreaster nodosus and Pentaceraster alveolatus contain protoreasteroside (54) and thornasteroside A (48) [63]. Acanthaster planci contains isonodososide (55) and 5-deoxyisonodososide (56) [64]. Another series of sea star saponins have been investigated similarly. Extraction with water followed by either filtration through Celite or centrifugation and chromatography of the aqueous extract on Amberlite XAD-2 yielded saponins in the methanol eluant (in one case an additional wash with acetone was used).

Suzuki T, Suzuki M, Furusaki A, Matsumoto T, Kato A, Imanaka Y, Kurosawa E (1985) Tetrahedron Lett 26:1329 77. Cimino G, de Giulio A, de Rosa S, de Stefano S, Sodano G (1985) J Nat Prod 48:22 78. Quinn RJ, Tucker DJ (1985) Tetrahedron Lett 26:1671 79. Schmitz FJ, Gunasekera SP, Gopichand Y, Hossain MH, van der Helm D (1984) J Am Chern Soc 106:7251 80. D'Ambrosio M, Guerriero A, Pietra F (1984) Helv Chim Acta 67:1484 81. Guerriero A, D'Ambrosio M, Traldi P, Pietra F (1984) Naturwissenschaften 71:425 82.

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Bioorganic Marine Chemistry by Ronald J. Quinn (auth.), Professor Paul J. Scheuer (eds.)

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