Natural resorcylic lactones derived from alternariol

• Joachim Podlech

Beilstein J. Org. Chem. 2024, 20, 2171–2207, doi:10.3762/bjoc.20.187

• [171], Hyalodendriella sp. [172], Paraconiothyrium sporulosum [173], Pestalotiopsis uvicola [174], and from Talaromyces amestolkiae [175]. Graphislactone A showed moderate activity against acetylcholinesterase (AChE) with an IC50 value of 8.1 μg/mL [167] and is a scavenger for the 2,2-diphenyl-1

• Talaromyces flavus [49], T. pinophilus [227], Penicillium verruculosum [228], P. simplicissimum [229], and a further unidentified P. sp. [228][230], from Streptomyces verticillus [228], Coleophoma sp. [231], Ulocladium sp. [210], Botryosphaeria dothidea [232], and from a Pleosporales sp. [233]. As one of the

• . [147] and later from Talaromyces sp. [243]. Its structure was elucidated by NMR spectroscopy and later unambiguously confirmed by total synthesis [191]. It was cytotoxic against L5178Y mouse lymphoma cells (EC50 = 6.2 µg/mL) [147] and against THLE and HBE cell lines (IC50 = 44 and 41 µg/mL

Characterization of a new fusicoccane-type diterpene synthase and an associated P450 enzyme

• Jia-Hua Huang,
• Jian-Ming Lv,
• Liang-Yan Xiao,
• Qian Xu,
• Fu-Long Lin,
• Gao-Qian Wang,
• Guo-Dong Chen,
• Sheng-Ying Qin,
• Dan Hu and
• Hao Gao

Beilstein J. Org. Chem. 2022, 18, 1396–1402, doi:10.3762/bjoc.18.144

• Talaromyces wortmannii ATCC 26942. Heterologous expression reveals that TadA catalyzes the formation of a new fusicoccane-type diterpene talaro-7,13-diene. D2O isotope labeling combined with site-directed mutagenesis indicates that TadA might employ a different C2,6 cyclization strategy from the known

• Talaromyces wortmannii ATCC 26942, in which TadA is identified to be a new FC-type DTS responsible for the formation of talaro-7,13-diene, and the associated P450 enzyme TadB is characterized to be a multifunctional enzyme, converting talaro-7,13-diene to highly oxygenated talaro-6,13-dien-5,8-dione. Results

Absolute configurations of talaromycones A and B, α-diversonolic ester, and aspergillusone B from endophytic Talaromyces sp. ECN211

• Ken-ichi Nakashima,
• Junko Tomida,
• Takao Hirai,
• Yoshiaki Kawamura and
• Makoto Inoue

Beilstein J. Org. Chem. 2020, 16, 290–296, doi:10.3762/bjoc.16.28

• -cho, Chikusa-ku, Nagoya, Aichi, Japan 10.3762/bjoc.16.28 Abstract Talaromycones A (1) and B (2), new xanthenediones, were isolated from the cultures of Talaromyces sp. ECN211, an endophytic fungus, along with α-diversonolic ester (3), aspergillusone B (4), glauconic acid (5), and rosellisin (6). The

• first time in over 50 years. Keywords: absolute configuration; endophytic fungus; glauconic acid; Talaromyces; tetrahydroxanthone; xanthenedione; Introduction The xanthones, which are a class of phenolic compounds produced by many different organisms, including plants, lichens, fungi, and bacteria

• esters [3], and globosuxanthone B [4], among others. Diversonolic esters were firstly reported by Holker from cultures of Talaromyces diversus, anamorph Penicillium diversum [3]; however, the originally proposed structures of the diversonolic esters were revised after 25 years, following their total

Synthesis of a derivative of α-D-Glcp(1->2)-D-Galf suitable for further glycosylation and of α-D-Glcp(1->2)-D-Gal, a disaccharide fragment obtained from varianose

• Carla Marino,
• Carlos Lima,
• Karina Mariño and
• Rosa M. de Lederkremer

Beilstein J. Org. Chem. 2012, 8, 2142–2148, doi:10.3762/bjoc.8.241

• hydrolysis, which preferentially cleaves the furanosidic linkages, allowed the isolation and characterization of the disaccharide with the reducing galactose isomerized to the more stable pyranose form. The same disaccharide unit is present in the cell-wall polysaccharide of Talaromyces flavus [5] and in the

Marilones A–C, phthalides from the sponge-derived fungus Stachylidium sp.

• Celso Almeida,
• Stefan Kehraus,
• Miguel Prudêncio and
• Gabriele M. König

Beilstein J. Org. Chem. 2011, 7, 1636–1642, doi:10.3762/bjoc.7.192

• occurring compounds described [1]. They are produced by a wide range of organisms, i.e., by marine and terrestrial fungi belonging to genera such as Ascochyta [2], Aspergillus [3][4][5], Alternaria [6], Penicillium [7], Hericium [8] or Talaromyces [9], but also by plants and liverworts [1]. Phthalides