The extraordinary power of high‐pressure/solvent‐free conditions for the Diels–Alder reaction of thiophene has been established. For example, maleic anhydride (X=O) reacted with thiophene at 0.8 GPa and 100 °C to give the desired exo adduct in almost quantitative yield (see scheme). Further application of this method to maleimide (X=NR) and acrylic dienophiles demonstrated its remarkable potential.

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AINOYAIn order to bring environmental problems into solution , it is necessary to understand their attitudes toward environments and to try to bridge the gap between those differences . In this paper, we tried to make a model of the psychological processes and activities related to environmental problems using the method of social psychology . And through this model we observed the changes of the people's attitudes after learning environmental problems . The result of analysis has revealed two points as follows: (1) there are four psychological paths: knowledgeinterest, interest-motive, interest-intention, motive-intention . They can thought to build people's psychological processes. (2) Learning some environmental problems had influence on some psychological aspects such as interest, and motive. In addition, we propose the model that contains the factors to bring some psychological effect.

Druck gemacht! Diels‐Alder‐Reaktionen mit Thiophen wurden unter Hochdruck und lösungsmittelfreien Bedingungen durchgeführt. Beispielsweise reagierte Maleinsäureanhydrid (X=O) mit Thiophen bei 0.8 GPa und 100 °C fast quantitativ zum gewünschten exo‐Addukt (siehe Schema). Weitere Reaktionen unter diesen Bedingungen mit Maleinimid‐ (X=NR) und Acryl‐Dienophilen belegen das Potenzial dieser Methode.

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