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. 2019 Jul 25;10(36):8360–8366. doi: 10.1039/c9sc01491h

Fig. 2. Synthetic route for spiro-R series, including condensation reaction for the HTM-Br4 core and palladium-catalyzed Buchwald–Hartwig coupling between core and secondary amine (BPA-R) for functionalized spiro-R products.

Fig. 2