ChemInform Abstract: Omaezallene from Red Alga Laurencia sp.: Structure Elucidation, Total Synthesis, and Antifouling Activity.

ChemInform ◽  
2014 ◽  
Vol 45 (36) ◽  
pp. no-no
Author(s):  
Fuyuhiko Matsuda ◽  
et al. et al.
Keyword(s):  
Total Synthesis ◽  
Structure Elucidation ◽  
Red Alga ◽  
Antifouling Activity

Omaezallene from Red AlgaLaurenciasp.: Structure Elucidation, Total Synthesis, and Antifouling Activity

2014 ◽  
Vol 126 (15) ◽  
pp. 3990-3993 ◽  
Author(s):  
Taiki Umezawa ◽  
Yuko Oguri ◽  
Hiroshi Matsuura ◽  
Shohei Yamazaki ◽  
Masahiro Suzuki ◽  
...  
Keyword(s):  
Total Synthesis ◽  
Structure Elucidation ◽  
Antifouling Activity

Omaezallene from Red AlgaLaurenciasp.: Structure Elucidation, Total Synthesis, and Antifouling Activity

2014 ◽  
Vol 53 (15) ◽  
pp. 3909-3912 ◽  
Author(s):  
Taiki Umezawa ◽  
Yuko Oguri ◽  
Hiroshi Matsuura ◽  
Shohei Yamazaki ◽  
Masahiro Suzuki ◽  
...  
Keyword(s):  
Total Synthesis ◽  
Structure Elucidation ◽  
Antifouling Activity

scholarly journals New Haloterpenes from the Marine Red Alga Laurencia papillosa: Structure Elucidation and Biological Activity

Marine Drugs ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 35
Author(s):  
Mohamed Shaaban ◽  
Ghada S. E. Abou-El-Wafa ◽  
Christopher Golz ◽  
Hartmut Laatsch
Keyword(s):  
Biological Activity ◽  
Crude Extract ◽  
Structure Elucidation ◽  
Antimicrobial Activities ◽  
Red Alga ◽  
Spectroscopic Methods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chemical Structures ◽  
Terpene Derivatives

Analysis of the air-dried marine red alga Laurencia papillosa, collected near Ras-Bakr at the Suez gulf (Red Sea) in Egypt delivered five new halogenated terpene derivatives: aplysiolic acid (1), 7-acetyl-aplysiol (2), aplysiol-7-one (3), 11,14-dihydroaplysia-5,11,14,15-tetrol (5a), and a new maneonene derivative 6, named 5-epi-maneolactone. The chemical structures of these metabolites were characterized employing spectroscopic methods, and the relative and absolute configurations were determined by comparison of experimental and ab initio-calculated NMR, NOE, ECD, and ORD data, and by X-ray diffraction of 2 and 6. The antimicrobial activities of the crude extract and compounds 1–3, 5a and 6 were studied.

ChemInform Abstract: Total Synthesis and Structure Elucidation of (.+-.)-Triumphalone and (.+-.)-Isotriumphalone.

ChemInform ◽  
2015 ◽  
Vol 46 (22) ◽  
pp. no-no
Author(s):  
Eiji Nishimura ◽  
Yasufumi Ohfune ◽  
Tetsuro Shinada
Keyword(s):  
Total Synthesis ◽  
Structure Elucidation

Synthesis of Optically Active Hydroxyalkyl Cycloheptatrienes: A Key Step in the Total Synthesis of 6,11-Methylene-LXB4

Synlett ◽  
2020 ◽  
Vol 32 (01) ◽  
pp. 45-50
Author(s):  
Udo Nubbemeyer ◽  
Analuisa Nava ◽  
Lukas Trippe ◽  
Andrea Frank ◽  
Lars Andernach ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Total Synthesis ◽  
Structure Elucidation ◽  
Butyl Ester ◽  
Optically Active ◽  
Chiral Hplc ◽  
Reaction Conditions ◽  
Acid Product ◽  
Tert Butyl ◽  
Nabh4 Reduction

AbstractStarting from methyl cycloheptatrienyl-1-carboxylate, 6-acylation was successfully achieved employing glutaryl chloride in the presence of AlCl3 under controlled reaction conditions to furnish keto carboxylic acid product. After protection of this keto carboxylic acid as tert-butyl ester, reagent-controlled enantioselective reductions delivered configuration-defined methyl-6-hydroxylalkyl cycloheptatriene-1-carboxylates with up to 80% ee. Whereas simple NaBH4 reduction of the keto carboxylic acid and subsequent lactonization afforded a methyl-6-tetrahydropyranonyl cycloheptatriene-1-carboxylate. Resolution using chiral HPLC delivered the product enantiomers with up to >99% ee Finally, ECD analyses enabled structure elucidation. The products are used as key intermediates in enantioselective 6,11-methylene-lipoxin B4 syntheses.

Total Synthesis Guided Structure Elucidation of (+)‐Psychotetramine

2011 ◽  
Vol 123 (12) ◽  
pp. 2768-2771 ◽  
Author(s):  
Klement Foo ◽  
Timothy Newhouse ◽  
Ikue Mori ◽  
Hiromitsu Takayama ◽  
Phil S. Baran
Keyword(s):  
Total Synthesis ◽  
Structure Elucidation

Structure Elucidation and Total Synthesis of Kulkenon

2014 ◽  
Vol 53 (7) ◽  
pp. 1795-1798 ◽  
Author(s):  
Gerrit Symkenberg ◽  
Markus Kalesse
Keyword(s):  
Total Synthesis ◽  
Structure Elucidation

Structure elucidation of hypocreolide A by enantioselective total synthesis

2010 ◽  
Vol 8 (9) ◽  
pp. 2123 ◽  
Author(s):  
Katharina Götz ◽  
Johannes C. Liermann ◽  
Eckhard Thines ◽  
Heidrun Anke ◽  
Till Opatz
Keyword(s):  
Total Synthesis ◽  
Structure Elucidation ◽  
Enantioselective Total Synthesis

Total Synthesis and Structure Elucidation of (+)-Phorbasin C

2009 ◽  
Vol 131 (4) ◽  
pp. 1392-1393 ◽  
Author(s):  
Todd K. Macklin ◽  
Glenn C. Micalizio
Keyword(s):  
Total Synthesis ◽  
Structure Elucidation
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