Polycyclic aromatic azomethine ylides: a unique entry to extended polycyclic heteroaromatics

Polycyclic aromatic azomethine ylides: a unique entry to extended polycyclic heteroaromatics.

Based on polycyclic aromatic azomethine ylides (PAMYs), a metal-free "cycloaddition-planarization-sequence" is proposed, providing a unique entry to extended nitrogen-containing polycyclic aromatic hydrocarbons (N-PAHs). This method is highly versatile, as the structure of unprecedented N-PAHs can be tailored by the dipolarophile in the crucial 1,3-cycloaddition-reaction. Linear, as well as fiv...

Extended O‐Doped Polycyclic Aromatic Hydrocarbons

The synthesis of O-doped benzorylenes, in which peripheral carbon atoms have been replaced by oxygen atoms, has been achieved for the first time. This includes key high-yielding ring-closure steps which, through intramolecular C-O bond formation, allow stepwise planarization of oligonaphthalenes. Single-crystal X-ray diffraction showed that the tetraoxa derivative forms remarkable face-to-face ...

Polycyclic aromatic azomethine ylides: a unique entry to extended polycyclic heteroaromatics† †Electronic supplementary information (ESI) available. CCDC 1022817 and 1022816. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c4sc02793k Click here for additional data file. Click here for additional data file.

Transport of Polycyclic Aromatic Hydrocarbons in a Calcareous Wetland Soil

Knowledge of transport and degradation of polycyclic aromatic hydrocarbons (PAHs) is important in assessing PAH contamination of soils and water resources. The transport of naphthalene, anthracene, pyrene and phenanthrene was determined in a contaminated calcareous soil obtained from the Shadegan wetland (Khozestan, Iran) considering a column study in laboratory conditions. The PAHs were added ...

A convergent approach to polycyclic aromatic hydrocarbons.

A new concise route to Polycyclic Aromatic Hydrocarbons (PAHs) through radical addition and cyclisation of xanthates is described.