Direct Formation by RCM

After RCM, oxidation of cyclized products that lack a degree of unsaturation of aromatization is a simple and powerful method as well as the above-mentioned direct method for the synthesis of aromatic compounds. Although aromatic compounds by an RCM/oxidation sequence in early examples had been considered to be undesirable products, many researchers now use this sequence intentionally for the synthesis of various aromatic compounds. For example, the formation of tetracycle 

An RCM/isoaromatizaion sequence is another way to synthesize aromatic compounds. Gonzdlez-P6rez et al. prepared diene 73 from aldehyde 72 by Wittig 

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