A simple and efficient method to generate macrocyclic structures has been developed based on the dynamic behavior of the linker bis(2,2,6,6‐tetramethylpiperidin‐1‐yl)disulfide (BiTEMPS). The prime linear structure was transformed into a (macro)cycle using the following sequence: 1) thiol–ene reaction with a BiTEMPS derivative to afford the linear precursor, then 2) an entropy‐driven transformation induced by diluting and heating. The radicals generated from BiTEMPS upon heating are highly tolerant toward a variety of chemical species, including oxygen and olefins, but they exhibit high reactivity in exchange reactions, which can be applied to the topology transformation of various skeletons. The advantages of the present method, namely, its procedural simplicity and substrate versatility, are demonstrated by the gram‐scale synthesis of cyclic compounds with low and relatively high molecular weight.

A simple and efficient method to generate macrocyclic structures has been developed based on the dynamic behavior of the linker bis(2,2,6,6‐tetramethylpiperidin‐1‐yl)disulfide (BiTEMPS). The prime linear structure was transformed into a (macro)cycle using the following sequence: 1) thiol–ene reaction with a BiTEMPS derivative to afford the linear precursor, then 2) an entropy‐driven transformation induced by diluting and heating. The radicals generated from BiTEMPS upon heating are highly tolerant toward a variety of chemical species, including oxygen and olefins, but they exhibit high reactivity in exchange reactions, which can be applied to the topology transformation of various skeletons. The advantages of the present method, namely, its procedural simplicity and substrate versatility, are demonstrated by the gram‐scale synthesis of cyclic compounds with low and relatively high molecular weight.

This study discusses robust control problems related to the fall of two-wheel motor vehicles during parking or low-speed driving. The robotic motorcycle includes a new rotary axis that can vary the position of the total center of gravity. Some authors have already reported preliminary control demonstrations using a typical PID controller and simple LQR. Moreover, the mathematical model of a robotic motorcycle derived using multibody dynamics methods and its optimal regulator simulation were developed. However, an experimental investigation of a robust control strategy for practical implementation has not yet been conducted. Therefore, this study proposes a practical method based on applying a sliding mode controller (SMC) to improve robust stability in a real usage environment. Here, we introduce the control system design combining a novel mathematical model, including a minor PID control loop and the SMC, with its hyperplane designed by the frequency-shaped optimal regulator. Finally, its effectiveness is verified by experiments using an actual robotic motorcycle.