Many metabolites with novel structures and biological activities have been isolated from the mangrove fungi in the South China Sea, such as anthracenediones, xyloketals, sesquiterpenoids, chromones, lactones, coumarins and isocoumarin derivatives, xanthones, and peroxides. Some compounds have anticancer, antibacterial, antifungal and antiviral properties, but the biosynthesis of these compounds...

In the title compound, C(16)H(11)BrO(2), the isocoumarin ring system is planar (r.m.s. deviation = 0.015 Å) and subtends a dihedral angle of 88.90 (2)° with the bromo-benzene ring. In the crystal, mol-ecules are linked, forming a three-dimensional packing pattern involving C-H⋯O inter-actions, Br⋯O contacts [3.4734 (10) Å] and π-π stacking inter-actions with centroid-centroid distances ranging ...

The asymmetric unit of the title compound, C(16)H(11)ClO(2), a chemically synthesized isocoumarin, contains three independent mol-ecules. The benzopyran and benzene rings are approximately perpendicular to each other, forming dihedral angles ranging from 83.08 (14) to 87.43 (11)°. In the crystal structure, mol-ecules are linked by inter-molecular C-H⋯O hydrogen-bonding inter-actions, forming ch...

A novel transition-metal-free direct synthesis of 3-substituted isocoumarin from 4-hydroxycoumarin and a benzyne precursor is developed. This synthetic strategy proceeds via C-O and C-C bond cleavage as well as C-O and C-C bond formations in a single reaction vessel by simple treatment with CsF in the absence of catalyst. This methodology affords moderate to good yields of 3-substituted isocoum...

An efficient combination between the Passerini three-component reaction and aldol condensation has been developed for the synthesis of bicyclic isocoumarins with different substituted patterns via solvent-dependent domino pathways. These two operationally friendly methods simultaneously install C-O and C-C bonds in a one-pot manner, allowing the utilization of low-cost and readily accessible 2-...

Previously, we found that phenolic content and antioxidant capacity (AOX) in carrots increased with wounding intensity. It was also reported that UV radiation may trigger the phenylpropanoid metabolism in plant tissues. Here, we determined the combined effect of wounding intensity and UV radiation on phenolic compounds, AOX, and the phenylalanine ammonia-lyase (PAL) activity of carrots. Accordi...

Rhomboid proteases have many important biological functions. Unlike soluble serine proteases such as chymotrypsin, the active site of rhomboid protease, which contains a Ser-His catalytic dyad, is submerged in the membrane and surrounded by membrane-spanning helices. Previous crystallographic analyses of GlpG, a bacterial rhomboid protease, and its complex with isocoumarin have provided insight...