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A two-step, one-pot synthetic method that relies on gold(I)-catalyzed tandem heterocyclization/Petasis–Ferrier rearrangement and Brønsted acid-assisted debenzoxylation of 2-(N-(prop-2-ynyl)-N-tosylamino)benzaldehydes to prepare (Z)-1,2-dihydro-1-tosylbenzo[b]azepin-3-ones efficiently is reported. The reactions proceed rapidly under mild and operationally straightforward conditions for a wide variety...
The golden ring: A synthetic approach to benzo[b]oxepin‐3(2 H)‐ones by heterocyclization/Petasis–Ferrier rearrangement of 2‐(prop‐2‐ynyloxy)benzaldehydes is reported. Uniquely, the ring formation was found to only proceed efficiently in the presence of a gold catalyst. Substitution at the position ortho to the ethereal group on the salicylaldehyde ring was shown to dramatically enhance reactivity...
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