Selective synthesis of - and cycloparaphenylenes†
Cycloparaphenylenes (CPPs) are a remarkable class of hoop-shaped conjugated macrocycles with inimitable properties. Herein we describe a divergent synthesis of CPP and CPP. Furthermore we present the first crystal structure of CPP. Thus, we have now established the size-selective synthesis of [n]CPP (n = 7–16) in a uniformed cyclohexane-based method.