Iodo‐substituted triphenylene‐based discogens: by metal‐mediated oxidative cross‐coupling

Abstract

New monoiodopentakis(alkoxy)triphenylene derivatives were synthesized and characterized. The metal‐mediated oxidative coupling of 2‐iodoalkoxybenzene with 3,3′,4,4′‐tetraalkoxybiphenyl by MoCl₅ as oxidizing reagent yields 2‐iodopentakis(alkoxy)triphenylene. These products were purified by repeated column chromatography; their liquid crystalline properties were studied by polarizing optical microscopy and differential scanning calorimetry. All the derivatives exhibit a columnar mesophase over a wide temperature range.

Acknowledgement

SKV is very grateful to Dr S. K. Prasad for many helpful discussion and keen support.