Stabilised sulfur ylides are synthetically appealing compounds, which reactivity under Brønsted acid catalysis has been poorly explored. Herein, we report a new catalyst- and substrate- dependent chemodivergent reaction between stabilised salicylaldehydes, leading to the (suprising) formation of 2H-chromenes or dihydrobenzofurans products. Particular attention was set on unusual mechanisms invo...

Flexible multimedia streaming such as advertisement insertion, location-based services, mobility, and wireless access are vital components that make existing Internet radio and TV networks more attractive to roaming users. All of these applications also provide added value to telematics and military usage, including coordination, education, situation awareness, distributed simulation, battlefie...

Synopsis This essay explores the representation of Italian terrorists in recent generational films set in the 1960s and 1970s. While they foreground the protagonists’ youth and celebrate it as a historically new condition, these coming-of-age narratives typically present radicalism either in terms of youthful idealism or youthful error, with corresponding nostalgic or revisionist approaches tha...

silica-bonded n-propyltriethylene-tetramine (sbnptt) was found as an efficient solid base for the synthesis of 2-amino-5-oxo-5,6,7,8-tetrahydro-4h-chromenes. chromene derivatives were obtained via the three-component condensation reaction of aromatic aldehydes, malononitrile, and dimedone at 80 oc under solvent-free conditions. the heterogeneous solid base showed much the same efficiency when u...