[摘要]：Tin(II) chloride dihydrate-mediated deacetalization-bicyclization procedures for the construction of novel polycyclic heterocycles from amides possessing a pendant acetal group are reported. Optimization and scoping studies are described; using this methodol., a range of known, and novel, ring-fused heterocyclic systems have been prepd., some in enantiomerically pure form.
