Deacetalisation–bicyclisation routes to novel polycyclic heterocycles using stannous chloride dihydrate
作者:Alex N. Cayley、Rhona J. Cox、Cécilia Ménard-Moyon、Jan Peter Schmidt、Richard J.K. Taylor
DOI:10.1016/j.tetlet.2007.07.018
日期:2007.9
The stannouschloride dihydrate-mediated deprotection–bicyclisation of a range of amides possessing a pendant acetal group is reported. These mild reaction conditions have been used to prepare a number of ring-fused heterocyclic compounds, some in enantiomerically pure form, which should be of interest both in their own right and as building blocks for the production of more complex target molecules
Tin(II) chloride dihydrate-mediated deacetalisation- bicyclisation procedures for the construction of novel polycyclic heterocycles from amides possessing a pendant acetal group are re- ported. Optimisation and scoping studies are described; using this methodology, a range of known, and novel, ring-fused heterocyclic systems have been prepared, some in enantiomerically pure form.