The mapping of the geomagnetic field has been of intense interest for the past several years. Accurate charts, on a worldwide basis, that describe useful parameters associated with field line geometry could be of extensive use in the study of the inner magnetosphere. Computer models exist today that can trace field lines and can accurately calculate kinematic parameters associated with trapped energetic particles. In many cases, however, a method of quick reference to a complete set of geomagnetic field charts would be preferable to a detailed and costly calculation of the desired information.

A new domino reaction sequence for the construction of 2-pyridone structures is reported. The reaction sequence begins with diacetyldiketopiperazine and proceeds via aldol condensation, alkene isomerization, and intramolecular Diels–Alder cycloaddition. The intermediate [2.2.2]diazabicycloalkene cycloadducts can be isolated or can engage in a base- accelerated extrusion of one lactam bridge to provide the 2-pyridone cycloreversion products. The operation leading to pyridone products can occur in one reaction vessel and proceeds at convenient temperatures.

A new extension for the ‘one pot’ construction of diverse 1-azafluorene derivatives featuring a Diels–Alder/retro-Diels–Alder cycloaddition is reported. Conditions were also determined for oxidation to the derived azafluorenones. The spectrophotometric analysis of five different azafluorenones were performed. Moderate fluorescence was observed with azafluorenone derivatives that bear an imbedded pyridone motif; whereas those bearing substituted pyridines do not fluoresce.