DOI: 10.1055/s-00000084

Synthesis

References

We found that HCl-mediated deprotection of compounds 18d/e can lead to undesired 5-endo-dig cyclization, which can be avoided by using TMSBr; see: Octa-Smolin F, van der Vight F, Yadav R, Bhangu J, Soloviova K, Wolper C, Daniliuc CG, Strassert CA, Somnitz H, Jansen G, Niemeyer J.
J. Org. Chem. 2018;
83: 14568

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