Chemical constituents from endophytic fungus Fusarium oxysporum

QX Wang, SF Li, F Zhao, HQ Dai, L Bao, R Ding, H Gao… - Fitoterapia, 2011 - Elsevier
A new oxysporidinone analogue (1) and a new 3-hydroxyl-2-piperidinone derivative (2),
along with the known compounds (−)-4, 6′-anhydrooxysporidinone (3),(+)-fusarinolic acid …

Phosphine-Catalyzed Synthesis of 6-Substituted 2-Pyrones:  Manifestation of E/Z-Isomerism in the Zwitterionic Intermediate

XF Zhu, AP Schaffner, RC Li, O Kwon - Organic Letters, 2005 - ACS Publications
We report a one-step phosphine-catalyzed annulation between aldehydes and ethyl
allenoate to form 6-substituted 2-pyrones. The mechanistic rationale for this reaction …

α-Pyrones and diketopiperazine derivatives from the marine-derived actinomycete Nocardiopsis dassonvillei HR10-5

P Fu, P Liu, H Qu, Y Wang, D Chen… - Journal of natural …, 2011 - ACS Publications
Three new α-pyrones, nocapyrones E–G (1–3), and three new diketopiperazine derivatives,
nocazines A–C (4–6), together with a new oxazoline compound, nocazoline A (7), were …

In Situ Formation of RSCl/ArSeCl and Their Application to the Synthesis of 4-Chalcogenylisocumarins/Pyrones from o-(1-Alkynyl)benzoates and (Z)-2-Alken-4 …

L Xing, Y Zhang, B Li, Y Du - Organic letters, 2019 - ACS Publications
The reaction of diorganyl disulfides or diselenides with PhICl2 in acetonitrile was found for
the first time to lead to the in situ formation of organosulfenyl chloride or selenenyl chloride …

Structures, activities and drug-likeness of anti-infective xanthone derivatives isolated from the marine environment: a review

DRP Loureiro, JX Soares, JC Costa, ÁF Magalhães… - Molecules, 2019 - mdpi.com
Marine organisms represent almost half of total biodiversity and are a very important source
of new bioactive substances. Within the varied biological activities found in marine products …

The chemical composition, antifungal, antioxidant and antimutagenicity properties of bioactive compounds from fungal endophytes associated with Thai orchids

N Bungtongdee, K Sopalun… - Journal of …, 2019 - Wiley Online Library
Some plant‐derived bioactive compounds produced by fungal endophytes have been
proven to have antimicrobial and antioxidant activities. In this study, endophytic fungi were …

Unusually cyclized triterpenoids: occurrence, biosynthesis and chemical synthesis

H Hussain, J Xiao, A Ali, IR Green… - Natural Product …, 2023 - pubs.rsc.org
Covering: 2009 to 2021 Biosynthetically, most of the syntheses of triterpenes follow the
cascade cyclization and rearrangement of the acyclic precursors viz., squalene (S) and 2, 3 …

[HTML][HTML] Biosynthesis of α-pyrones

TF Schäberle - Beilstein journal of organic chemistry, 2016 - beilstein-journals.org
The α-pyrone moiety is a structural feature found in a huge variety of biologically active
metabolites. In recent times new insights into additional biosynthetic mechanisms, yielding …

Selective synthesis of natural and unnatural 5, 6-disubstituted 2 (2H)-pyranones via iodolactonization of 5-substituted (Z)-2-en-4-ynoic acids

F Bellina, M Biagetti, A Carpita, R Rossi - Tetrahedron, 2001 - Elsevier
Reaction of 5-substituted (Z)-2-en-4-ynoic acids with iodine and NaHCO3 in CH3CN or with
ICl in CH2Cl2 affords mixtures of (E)-5-(1-iodoylidene)-2 (5H)-furanones and 6-substituted 5 …

Malabaricane and isomalabaricane triterpenoids, including their glycoconjugated forms

VA Stonik, SA Kolesnikova - Marine Drugs, 2021 - mdpi.com
In this review, we discuss structural diversity, taxonomic distribution, biological activities,
biogenesis, and synthesis of a rare group of terpenoids, the so-called malabaricane and …