Results 31 to 40 of about 3,567,305 (338)

A review of the total syntheses of triptolide

open access: yesBeilstein Journal of Organic Chemistry, 2019
Triptolide is a complex triepoxide diterpene natural product that has attracted considerable interest in the organic chemistry and medicinal chemistry societies due to its intriguing structural features and multiple promising biological activities.
Xiang Zhang, Zaozao Xiao, Hongtao Xu
doaj   +1 more source

Marine Spirotetronates: Biosynthetic Edifices That Inspire Drug Discovery

open access: yesMarine Drugs, 2019
Spirotetronates are actinomyces-derived polyketides that possess complex structures and exhibit potent and unexplored bioactivities. Due to their anticancer and antimicrobial properties, they have potential as drug hits and deserve further study.
Alexander A. Braddock   +1 more
doaj   +1 more source

Total synthesis of decarboxyaltenusin [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2021
The total synthesis of decarboxyaltenusin (5’-methoxy-6-methyl-[1,1’-biphenyl]-3,3’,4-triol), a toxin produced by various mold fungi, has been achieved in seven steps in a yield of 31% starting from 4-methylcatechol and 1-bromo-3,5-dimethoxybenzene, where the longest linear sequence consists of five steps.
Lucas Warmuth   +5 more
openaire   +5 more sources

Studies toward the Total Synthesis of Itralamide B and Biological Evaluation of Its Structural Analogs

open access: yesMarine Drugs, 2015
Itralamides A and B were isolated from the lipophilic extract of Lyngbya majuscula collected from the eastern Caribbean. Itralamide B (1) showed cytotoxic activity towards human embryonic kidney cells (HEK293, IC50 = 6 μM).
Xiaoji Wang   +8 more
doaj   +1 more source

Total Synthesis and Absolute Configuration of the Marine Norditerpenoid Xestenone

open access: yesMarine Drugs, 2009
Xestenone is a marine norditerpenoid found in the northeastern Pacific sponge Xestospongia vanilla. The relative configuration of C-3 and C-7 in xestenone was determined by NOESY spectral analysis.
Hiroaki Miyaoka   +3 more
doaj   +1 more source

The Total Synthesis of Moenomycin A [PDF]

open access: yesJournal of the American Chemical Society, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Zhu, W   +4 more
openaire   +7 more sources

Total Synthesis of the Highly N-Methylated Peptides Carmabin A and Dragomabin

open access: yesMarine Drugs, 2018
The first total synthesis of carmabin A and dragomabin was achieved at 52.3 mg and 43.8 mg scale, respectively. The synthesis led to determination of the configuration of carmabin A and reassignment of the configuration of dragomabin at the stereogenic ...
Baijun Ye   +7 more
doaj   +1 more source

Total Synthesis of (−)-Himalensine A

open access: yesJournal of the American Chemical Society, 2017
The first enantioselective synthesis of (-)-himalensine A has been achieved in 22 steps. The synthesis was enabled by a novel catalytic, enantioselective prototropic shift/furan Diels-Alder (IMDAF) cascade to construct the ACD tricyclic core. A reductive radical cyclization cascade was utilized to build the B ring, and end-game manipulations featuring ...
Shi, H   +6 more
openaire   +5 more sources

Total Synthesis and Structural Revision of the Alkaloid Incargranine B [PDF]

open access: yes, 2013
Seeing double: Consideration of the biosynthetic origins of incargranineB, which was originally assigned an unprecedented indolo[1.7]naphthyridine structure, led to the proposal of a dipyrroloquinoline framework as a more biosynthetically feasible ...
Bates   +8 more
core   +1 more source

A new member of the fusaricidin family – structure elucidation and synthesis of fusaricidin E

open access: yesBeilstein Journal of Organic Chemistry, 2017
Two hitherto unknown fusaricidins were obtained from fermentation broths of three Paenibacillus strains. After structure elucidation based on tandem mass spectrometry and NMR spectroscopy, fusaricidin E was synthesized to confirm the structure and the ...
Marcel Reimann   +5 more
doaj   +1 more source

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