Tetra-tert-butyltetraoxa[8]circulene and Its Unusual Aggregation Behaviour

We describe the first example of the synthesis of a tetraoxa[8]circulene with only four substituents by means of BF 3 ·OEt 2 mediated tetramerisation of tert-butyl-1,4-benzoquinone. Two of the four regioisomers of tetra-tert-butyltetraoxa[8]circulene have been isolated and characterised b