Synthesis of π-conjugated polycyclic compounds by late-stage extrusion of chalcogen fragments

• Aissam Okba,
• Pablo Simón Marqués,
• Kyohei Matsuo,
• Naoki Aratani,
• Hiroko Yamada,
• Gwénaël Rapenne and
• Claire Kammerer

Beilstein J. Org. Chem. 2024, 20, 287–305, doi:10.3762/bjoc.20.30

• absence of thermal solid-state reorganization [62]. This work thus unequivocally revealed the potential of thiepines and thiepine S-oxides as direct soluble precursors of polycyclic aromatic compounds with dual stimuli-responsiveness, thus opening the way to solution-based processing for the fabrication

Chemical syntheses and salient features of azulene-containing homo- and copolymers

• Vijayendra S. Shetti

Beilstein J. Org. Chem. 2021, 17, 2164–2185, doi:10.3762/bjoc.17.139

• Vijayendra S. Shetti Department of Chemistry, National Institute of Technology Karnataka, Surathkal 575025, India 10.3762/bjoc.17.139 Abstract Azulene is a non-alternant, aromatic hydrocarbon with many exciting characteristics such as having a dipole moment, bright color, stimuli responsiveness

LCST phase behavior of benzo-21-crown-7 with different alkyl chains

• Yan Deng,
• Xing Li,
• Qiao Zhang,
• Zheng Luo,
• Chengyou Han and
• Shengyi Dong

Beilstein J. Org. Chem. 2019, 15, 437–444, doi:10.3762/bjoc.15.38

• -crown-7, B21C7s) can effectively control the thermo-responsive properties. Keywords: crown ethers; hydrophobic units; lower critical solution temperature; LCST; thermo-responsiveness; supramolecular chemistry; Introduction The introduction of stimuli-responsiveness into artificial materials is vital

A switchable [2]rotaxane with two active alkenyl groups

• Xiu-Li Zheng,
• Rong-Rong Tao,
• Rui-Rui Gu,
• Wen-Zhi Wang and
• Da-Hui Qu

Beilstein J. Org. Chem. 2018, 14, 2074–2081, doi:10.3762/bjoc.14.181

• polymers. Keywords: alkenyl bond; functional crown ether; stimuli-responsiveness; switchable rotaxane; Introduction Along with the development of supramolecular chemistry, much attention has been paid to the design and synthesis of novel and complicated mechanical interlocked molecules (MIMs) [1][2][3][4

• microscopic units with traditional materials to achieve morphological changes or other novel properties in smart materials is continuously receiving wide attention. Hence, in recent years, scientists have put more interests on the macroscopic changes caused by the stimuli-responsiveness of constituent units

• equiv of DBU to (a). Chemical structures and acid-base stimuli responsiveness of target [2]rotaxane R1 and deprotonated [2]rotaxane R1-1. Syntheses of key intermediates 5, 8 and target [2]rotaxane R1. Supporting Information Supporting Information File 188: 1H, 13C NMR spectra and HRESI mass spectra of

Supramolecular chemistry: from aromatic foldamers to solution-phase supramolecular organic frameworks

• Zhan-Ting Li

Beilstein J. Org. Chem. 2015, 11, 2057–2071, doi:10.3762/bjoc.11.222

• the hydrogen-bonded aromatic amide and hydrazide sequences as a longstanding research area. With these sequences as a structural basis, we were able to investigate many interesting phenomena or concepts in supramolecular chemistry such as stimuli responsiveness, “sergeant–soldier effect”, and