title: Highly twisted arenes by Scholl cyclizations with unexpected regioselectivity.
abstract: Let's twist! The Scholl reaction with quinquephenyl derivatives has been shown to have an unexpectedly strong preference for forming twisted, helicene aromatic polycycles, instead of their flat counterparts. This tendency is so strong that it will overcome even severe steric hindrance, and the procedure can be used in the efficient synthesis of hexa-tert-butylhexabenzotriphenylene from a simple biaryl starting material (see scheme).
authors: Centre de Recherche Paul Pascal, CNRS & Université de Bordeaux, 115 Avenue Schweitzer, 33600 Pessac, France.
authors: Anirban
authors: A
authors: Pradhan
authors: Pierre
authors: P
authors: Dechambenoit
authors: Harald
authors: H
authors: Bock
authors: Fabien
authors: F
authors: Durola
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D015394:Molecular Structure; D013237:Stereoisomerism
chemical_list: D047250:Calixarenes