Vilsmeier reagent-mediated synthesis of 6-[(formyloxy)methyl]-pyrazolopyrimidines via a one-pot multiple tandem reaction
2015
Lu, Shi-Han | Liu, Bolin | Wong, Fung Fuh
A new Vilsmeier reagent-mediated one-pot reaction using 5-(2-chloroacetylamino)pyrazoles as the starting material was developed for the efficient synthesis of 6-[(formyloxy)methyl]-1H-pyrazolo[3,4-d]pyrimidine. This new multiple tandem reaction, involving the Vilsmeier–Haack reaction, the Morgan–Walls reaction, sequential elimination, substitution, and final hydrolysis, afforded formyloxymethyl pyrazolo[3,4-d]pyrimidine products in good yields.
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