title: Synthesis of 1,4-cyclohexadiene-based acetylenic macrocycles with Cadiot-Chodkiewicz coupling. Structure of a tub-shaped tetrameric container.
abstract: The Cadiot-Chodkiewicz coupling of cis-1,4-diethynyl-1,4-dimethoxycyclohexa-2,5-diene and the corresponding ethynyl bromide gave a mixture of acetyenic macrocycles ranging from dimer to octamer in good isolable yields. The trimeric and tetrameric macrocycles have been structurally characterized by single-crystal X-ray crystallography. In the crystal structure of the trimeric macrocycle a molecule of benzene is sandwiched between a pair of macrocyles. The tetrameric macrocycle exhibited a tub-shaped conformation and encapsulated a molecule of ethyl acetate inside the tub.
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Madras, Chennai-600036, India.
authors.forename: Arkasish
authors.initials: A
authors.lastname: Bandyopadhyay
authors.forename: Babu
authors.initials: B
authors.lastname: Varghese
authors.forename: Sethuraman
authors.initials: S
authors.lastname: Sankararaman