91484-92-3Relevant academic research and scientific papers
Metal-induced regulation of fullerene complexation with double-calix[5]arene
Haino, Takeharu,Yamanaka, Yuko,Araki, Hiromi,Fukazawa, Yoshimasa
, p. 402 - 403 (2002)
The metal-induced regulation of fullerene complexation with double-calix[5]arene is described. The receptor shows strong binding to C70 only in the presence of Cu+.
An Indirect Synthetic Approach toward Conformationally Constrained 20-Membered Unclosed Cryptands via Late-Stage Installation of Intraannular Substituents
Jurczak, Janusz,Sobczuk, Adam,Dabrowa, Kajetan,Lindner, Marcin,Niedba?a, Patryk
supporting information, p. 13560 - 13567 (2018/11/20)
A new protocol for PTC-mediated O-alkylation of the intraannular position of 20-membered unclosed cryptands (UCs) is reported. In contrast to the classical, "direct" strategy, which requires functionalization of the lariat arm at the beginning of synthesis, this "indirect" approach enables the late-stage introduction of various benzylic substituents after an unfavorable macrocyclization step (11 examples, yields up to 98%). Notably, this method permits preparation of, previously inaccessible, crowded UCs bearing 1-acetylpyrene substituent and dimer joined by p-xylene linker.
