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Laurencia obtusa

Fig. 5.13 Map of eastern Sicily showing Laurencia obtusa collection sites... Fig. 5.13 Map of eastern Sicily showing Laurencia obtusa collection sites...
On the basis of morphological and secondary metabolic differences, Masuda et al. (1997c) concluded that an alga previously known as Laurencia obtusa (Hudson) Lamouroux var. snackeyi (Weber-van Bosse) Yamada (earlier name was L paniculata... [Pg.243]

Amico, V., Caccamese, S., Neri, P., Russo, G. and Foti, M. 1991. BrasUane-type ses-quiterpenoids from the Mediterraanean red alga Laurencia obtusa. Phytochemistry 30 1921-1928. [Pg.302]

Ayyad, S. E. N., Jakupovic, J. and Abdel-Mogib, M. 1994. A sesquiterpene ether from Laurencia obtusa. Phytochemistry 36 1077-1078. [Pg.303]

Caccamese, S., R. Azzolina, R. M. Toscano and K. L. Rinehart, Jr. 1981. Variations in the halogenated metabolites of Laurencia obtusa from eastern Sicily. Biochem. Syst. Ecol. 9 241-246. [Pg.306]

Oztunc, A., Imre, S., Loiter, H. and Wagner, H. 1991. Two C-15 bromoalleles form the red alga Laurencia obtusa. Phytochemistry 30 255-258. [Pg.324]

Pereira RC, Donato R, Teixeira VL, Cavalcanti DN (2000b) Chemotaxis and chemical defenses in seaweed susceptibility to herbivory. Rev Bras Biol 60 405 414 Pereira RC, Da Gama BAP, Teixeira VL, Yoneshigue-Valentin Y (2003) Ecological roles of natural products of the Brazilian red seaweed Laurencia obtusa. Rev Bras Biol 63 665-672 Pereira RC, Pinheiro MD, Teixeira VL, Da Gama BAP (2002) Feeding preferences of the endemic gastropod Astraea latispina in relation to chemical defenses of Brazilian tropical seaweeds. Braz J Biol 62 33 10... [Pg.54]

Sudatti DB, Rodrigues SV, Coutinho R, Da Gama BAP, Salgado LT, Amado Filho GM, Pereira RC. Transport and defensive role of elatol at the surface of the red seaweed Laurencia obtusa. J Phycol (in press)... [Pg.55]

Graciosallene (isolated from the red alga Laurencia obtusa) can be considered to be an opened 2,6-dioxabicydo[3.3.0]octane ... [Pg.1035]

A recent investigation of marine red algae has shown that the major lipid-soluble metabolite of Laurencia obtusa, collected in the English Channel, is 3j8-bromo-8-epicaparrapi oxide (11) (c/. isolation of a- and jS-snyderol (12) from L. obtusa collected in Spain Vol. 7, p. 54). [Pg.66]

Caccamese, S. Amico, V. (1990) Two new rearranged sesquherpenoids from the red alga Laurencia obtusa. J. Nat. Prod., 53, 1287-96. [Pg.309]

Takeda, S. limura, Y. Tanaka, K. Kurosawa, E. Suzuki, T. (1990) A new naturally occurring racemic ccnnpound from the marine red alga Laurencia obtusa. Chem. Lett., 155-6. [Pg.340]

Double Sharpless epoxidation was also applied to the synthesis of a key intermediate 10 to the meso-compound 11 that is related to teurilene, abioactive polycyclic triterpene isolated from red alga Laurencia obtusa,4 The reaction of ( , )-Bisallylic alcohol 9 gave the bisglycidic alcohol 10 with 80% de and 89% ee for each epoxidation (Scheme 6AA.4). [Pg.283]

An Okinawan collection of Laurencia luzonensis has yielded five new sesquiterpenes, luzonenone (339), luzofuran (340), 3,4-epoxypalisadin B (341), 1,2-dehydro-3,4-epoxypalisadin B (342), and 15-hydroxypalisadin A (343 (558). In addition, the relative stereochemistry of luzonensol (321) (vide supra) (549) was assigned by conversion to the known palisadin B (P) (7). The novel fused bisabo-lene aldingenins A (344), B (345), C (346), and D (347) were isolated from Laurencia aldingensis (559, 560). The interesting chlorotriol 348 was found in a Turkish Laurencia obtusa (561). [Pg.50]

The C15 acetogenin ( )-dihydrorhodophytin (677), an isomer of the previously known (Z)-isomer (1). is found in Laurencia pinnatifida from the Canary Islands (779). An Easter Island variety of Laurencia claviformis has afforded (3Z)-13-epipinnatifidenyne (678) (780). Likewise, an epimer of the previously known laurencienyne, 13-epilaurencienyne (679), is found in Laurencia obtusa from the Aegean coast (781). This same seaweed and locale yielded laurencienyne B (680), the cis isomer of laurencienyne (782), and the acetate 681 (783). This Aegean Sea Laurencia obtusa has also provided (3Z)-13-epilaurencienyne (682), (3 )-13-epi-pinnatifidenyne (683) (revised in (785)), 684, and 685 (784). The (Z)-diastereomers 682 and 685 showed very potent insecticidal activity. Three enantiomers of known compounds were identified in the sea hare Aplysia dactylomela, (-)-(3E,6R,7R)-pinnatifidenyne (686), (+)-(3 , 6/ ,7/ )-obtusenyne (687), and (+)-(3Z,6/ ,7/ )-obtu-senyne (688) (785). [Pg.97]

Laurencia obtusa from the western coast of Ireland has afforded scanlone-nyne (689), the first reported study of Laurencia red algae from Irish waters (786). A Japanese Laurencia sp. contains the new bisezakyne-A (690) and -B (691) (787). The red alga Ptilonia magellanica is the source of pyranosylma-gellanicus A-C (692—694) and the linear 695, a possible biogenetic precursor (788). [Pg.99]

Laurencia nipponica (790), and the structure and absolute configuration were confirmed by total synthesis (791). This new compound is a stereoisomer of the known (3Z)-isoprelaurefucin. A Malaysian Laurencia pannosa has yielded (3Z)-chlorofucin (698) (578), and (3Z)-bromofucin (699), which is also a new C15-acetogenin, is found in a South African sea hare, Aplysia parvula (792). The (3 )-neoisoprelaurefucin (700) was found in Laurencia obtusa collected in Turkish waters (557). [Pg.100]

Topcu G, Aydogmus Z, Imre S, Goren AC, Pezzuto JM, Clement JA, Kingston DGI (2003) Brominated Sesquiterpenes from the Red Alga Laurencia obtusa. J Nat Prod 66 1505... [Pg.403]

Brito I, Cueto M, Dorta E, Darias J (2002) Bromocyclococanol, a Halogenated Sesquiterpene with a Novel Carbon Skeleton from the Red Alga Laurencia obtusa. Tetrahedron Lett 43 2551... [Pg.403]

Aydogmus Z, Imre S, Ersoy L, Wray V (2004) Halogenated Secondary Metabolites from Laurencia obtusa. Nat Prod Res 18 43... [Pg.404]

Brito I, Cueto M, Diaz-Marrero AR, Darias J, San Martin A (2002) Oxachamigrenes, New Halogenated Sesquiterpenes from Laurencia obtusa. J Nat Prod 65 946... [Pg.404]

Iliopoulou D, Roussis V, Pannecouque C, De Clercq E, Vagias C (2002) Halogenated Sesquiterpenes from the Red Alga Laurencia obtusa. Tetrahedron 58 6749... [Pg.405]

Kladi M, Xenaki H, Vagias C, Papazafiri P, Roussis V (2006) New Cytotoxic Sesquiterpenes from the Red Alga Laurencia obtusa and Laurencia microcladia. Tetrahedron 62 182... [Pg.405]

Iliopoulou D, Vagias C, Galanakis D, Argyropoulos D, Roussis V (2002) Brasilane-Type Sesquiterpenoids from Laurencia obtusa. Org Lett 4 3263... [Pg.405]

Mihopoulos N, Vagias C, Scoullos M, Roussis V (1999) Laurencienyne B, a New Acetylenic Cyclic Ether from the Red Alga Laurencia obtusa. Nat Prod Lett 13 151... [Pg.414]

Aydogmus Z, Imre S (1999) a New Halogenated C15 Non-Terpenoid Compound from the Marine Red Alga, Laurencia obtusa. Acta Pharm Turc 41 93... [Pg.414]

Iliopoulou D, Vagias, C, Harvala C, Roussis V (2002) C15 Acetogenins from the Red Alga Laurencia obtusa. Phytochemistry 59 111... [Pg.414]

Suzuki M, Takahashi Y, Matsuo Y, Guiry MD, Masuda M (1997) Scanlonenyne, a Novel Halogenated C15 Acetogenin from the Red Alga Laurencia obtusa in Irish Waters. Tetrahedron 53 4271... [Pg.414]

Pereira RC, Da Gama BAP, Teixeira VL, Yoneshigue-Valentin Y (2003) Ecological Roles of Natural Products of the Brazilian Red Seaweed Laurencia obtusa. Braz J Biol 63 665... [Pg.500]

See other pages where Laurencia obtusa is mentioned: [Pg.303]    [Pg.44]    [Pg.55]    [Pg.80]    [Pg.401]    [Pg.49]    [Pg.53]    [Pg.54]    [Pg.55]    [Pg.64]    [Pg.100]    [Pg.374]    [Pg.244]    [Pg.358]    [Pg.359]    [Pg.362]    [Pg.347]   
See also in sourсe #XX -- [ Pg.97 , Pg.100 , Pg.374 ]

See also in sourсe #XX -- [ Pg.5 , Pg.8 , Pg.363 , Pg.625 ]

See also in sourсe #XX -- [ Pg.625 ]

See also in sourсe #XX -- [ Pg.5 , Pg.8 , Pg.363 , Pg.625 ]



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