Results 81 to 90 of about 3,824 (213)

Diketopiperazines and arylethylamides produced by Schizophyllum commune, an endophytic fungus in Alchornea glandulosa

Eclética Química, 2019
Chemical investigation of the crude PDB extract obtained from the endophytic fungus Schizophyllum commune afforded the pure substances, cyclo(L-Pro-L-Val) (1), uracil (2), cyclo(Pro-Tyr) (3), p-hydroxybenzoic acid (4) and a mixture of Rel.cyclo(Pro-Phe) (
Carolina Rabal Biasetto, Andressa Somensi, Fernanda Sales Figueiro, Luiz Alberto Beraldo de Moraes, Geraldo Humberto Silva, Maria Claudia Marx Young, Vanderlan da Silva Bolzani, Angela Regina Araújo   +7 more
doaj   +1 more source

Antifouling diketopiperazines produced by a deep-sea bacterium, Streptomyces fungicidicus

, 2006
Modern antifouling coatings use heavy metals and toxic organic molecules to prevent biofouling, the undesirable growth of marine organisms on man-made substrata.
Li, Xiancui, Xiao, Xiang, Hung, Oi, Qian, Pei Yuan, Xu, Ying, Dobretsov, Sergey   +5 more
core   +1 more source

Structures and Absolute Configurations of Diketopiperazine Alkaloids Chrysopiperazines A–C from the Gorgonian-Derived Penicillium chrysogenum Fungus

Marine Drugs, 2019
Three new diketopiperazine alkaloids, including two oxepine-containing diketopiperazines, chrysopiperazines A and B (1 and 2), and one quinazoline-containing diketopiperazine, chrysopiperazine C (5), together with three known analogues (3, 4, and 6 ...
Wei-Feng Xu, Ning Mao, Xiao-Jia Xue, Yue-Xuan Qi, Mei-Yan Wei, Chang-Yun Wang, Chang-Lun Shao   +6 more
doaj   +1 more source

Marine natural occurring 2,5-diketopiperazines : isolation, synthesis and optical properties

, 2015
Seven 2,5-diketopiperazines (DKPs) were isolated from the Fijian marine sponge Acanthella cavernosa. NMR and circular dichroism (CD) comparison with synthetic L-L DKPs allowed us to determine unambiguously the L-L absolute configuration of the natural ...
Petek, Sylvain, Al-Mourabit, Ali, Laville, R., Al-Mourabit, A., Thanh Binh Nguyen, Thanh Binh Nguyen,, Laville, Rémi, Moriou, C., Nguyen, T .B., Debitus, Cécile, Moriou, Céline, Petek, S., Débitus, C., Nguyen, T.B.   +13 more
core   +1 more source

Novel 2,5-Diketopiperazines with In Vitro Activities against Protozoan Parasites of Tropical Diseases

Pharmaceuticals
Malaria, Chagas disease, and leishmaniasis are tropical diseases caused by protozoan parasites of the genera Plasmodium, Trypanosoma and Leishmania, respectively.
Isabela P. Ceravolo, Letícia F. Leoni, Antoniana U. Krettli, Silvane M. F. Murta, Daniela de M. Resende, Mariza G. F. de M. L. Cruz, Jodieh O. S. Varejão, Lorena L. Mendes, Eduardo V. V. Varejão, Markus Kohlhoff   +9 more
doaj   +1 more source

Electron Transfer-Induced Coupling of Haloarenes to Styrenes and 1,1-Diphenylethenes Triggered by Diketopiperazines and Potassium tert-Butoxide

Molecules, 2015
The coupling of haloarenes to styrenes and 1,1-diarylethenes has been achieved with potassium tert-butoxide in the presence of N,N'-dialkyldiketopiperazines.
Eswararao Doni, Shengze Zhou, John A. Murphy   +2 more
doaj   +1 more source

Catalytic asymmetric synthesis of diketopiperazines by intramolecular Tsuji\u2013Trost allylation

, 2019
: We report the intramolecular Tsuji\u2013Trost reaction of Ugi adducts to give spiro-diketopiperazines in high yield and with high enantioselectivity.
Faltracco, Matteo; id_orcid, Ruijter, Eelco; id_orcid, Ruijter, Eelco, Vande Velde, Christophe M.L., Faltracco, Matteo, Cotogno, Silvia   +5 more
core   +1 more source

Diketopiperazines produced by an Aspergillus fumigatus Brazilian strain [PDF]

, 2015
Seven diketopiperazines, corresponding to the cyclos (L)-Pro-(L)- Phe, (L)-Pro-Gly, (L)-Pro-( L)-Pro, (L)- Pro-(L)-Val, (L)-4-OH-Pro-(L)-Leu, (L)-4-OH-Pro-(L)- Phe, and (L)-Pro-(L)-Leu, were isolated from the Aspergillus fumigatus fermentation broth. The
Bastos, JK, Carvalho, I, Pupo, MT, Campo, VL, Duarte, MCT, Furtado, NAJC   +5 more
core   +1 more source

Chemical Constituents and Anticancer Activities of Marine-Derived Fungus Trichoderma lixii

Molecules
The fungal genus Trichoderma is a rich source of structurally diverse secondary metabolites with remarkable pharmaceutical properties. The chemical constituents and anticancer activities of the marine-derived fungus Trichoderma lixii have never been ...
Natchanun Sirimangkalakitti, Jianyu Lin, Kazuo Harada, Andi Setiawan, Mitsuhiro Arisawa, Masayoshi Arai   +5 more
doaj   +1 more source

A Metabolomic Study of the Variability of the Chemical Composition of Commonly Consumed Coffee Brews

Metabolites, 2019
Coffee drinking has been associated with a lower risk of certain chronic diseases and overall mortality. Its effects on disease risk may vary according to the type of coffee brew consumed and its chemical composition.
Joseph A. Rothwell, Erikka Loftfield, Roland Wedekind, Neal Freedman, Callie Kambanis, Augustin Scalbert, Rashmi Sinha   +6 more
doaj   +1 more source