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TERT-BUTYL-4-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PHENYLCARBONATE tert-Butyl 4-((6-bromopyridin-3-yl)methyl)piperazine-1-carboxylate 2-bromo-1-(1-Boc-piperidin-4-yl)ethanone Carbamic acid, N-[(1S)-1-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]ethyl]-, 1,1-dimethylethyl ester