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A two-step sequence involving an Ugi four-component reaction and an intramolecular nucleophilic aromatic substitution (S N Ar) has been developed for the rapid access to biaryl-ether containing macrocycles. In the course of this study, we documented that ammonium chloride can promote the Ugi-4CR in non-polar aprotic solvent (toluene) without the interference of an alternative Passerini reaction...
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