SYNTHESIS OF AZA-BRIDGED CALIX(4-METHOXY)TRIAZINES TOWARD FLATTENED π-CONJUGATED MACROCYCLES

Calixtriazines containing a 4-alkoxy-l,3,5-triazine backbone were efficiently synthesized by sequential fragment coupling started from 4-alkoxy-2,6-dichrolo-l,3,5-triazine. These macrocycles tend to form flattened conformations, leading to a stable π-conjugated system, presumably due to the electronic features of the alkoxy-substituent on the triazine rings.

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