Journal
ORGANIC LETTERS
Volume 20, Issue 10, Pages 3114-3118Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.8b01204
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Funding
- DFG [SFB749]
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A regioselective functionalization of the pyrazolo[1,5-a]pyridine scaffold using Mg- and Zn-TMP bases (TMP = 2,2,6,6-tetramethylpiperidyl) in the presence or absence of BF3 center dot OEt2 is described. Also, various functionalized pyrazolo[1,5-a]pyridines bearing an ester function (and an NHBoc or ethyl group) are magnesiated and functionalized, leading to polysubstituted heterocycles. Additionally, a sulfoxide directed ortho-metalation, followed by the transition-metal-free amination of a pyrazolo[1,5-a]pyridine sulfoxide, using a magnesium amide, is reported.
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