We decided to apply these conditions to a variety of different hetero-stilbene substrates which were previously unknown or for which no Mallory reaction had been reported (cf. grey text in Table ). We were pleased to synthesise 2-chloro substituted thieno [4]helicene 2b in 77% yield on a 0.2 mmol scale. Due to the use of the continuous flow reactor, we were able to scale this reaction simply by increasing the injection volume while keeping all other parameters identical. Thus, a 9.8 mmol scale reaction of 1b afforded 2 g (79% yield) of 2b and allowed us to use the compound for further functionalisations (cf. Schemes 2 and 3).