Scheme 2.
Model Heck reaction of 3-bromo-N-methyl-1H-indazole (1a) and n-butyl acrylate (2a). (173 stainless-steel balls (dMB = 6 mm, ФMB = 0.245) were used. dMB = milling ball diameter. ФMB = milling ball filling degree.)
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