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Beilstein J. Org. Chem. 2018, 14, 2722–2729, doi:10.3762/bjoc.14.250
Graphical Abstract
Scheme 1: Our synthetic plan for pyrrolo[3,2-c]azepines.
Scheme 2: Preparation of precursors for the Pummerer reactions.
Scheme 3: Substrate scope of 1,7-S and 1,7-Se shift reactions.
Scheme 4: Proposed mechanism.
Scheme 5: Crossover experiment.
Scheme 6: Lewis acid-catalysed cyclization of diols.
Scheme 7: Sequential process of sulfanyl-1,6-diyne 1 to 4H-pyrrolo[3,4-g]oxazine 25g.