Treatment of the α,β-unsaturated ketones listed in Table 1 with trimethylsilyl azide in the presence of trimethylsilyl triflate gave the ring expanded tetrazole derivatives 8–11.
P. Magnus and G. M. Taylor, J. Chem. Soc., Perkin Trans. 1, 1991, 2657 DOI: 10.1039/P19910002657
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