2,2,6,6-Tetramethyl-4-piperidone hydrochloride has been used as a reagent injected in the micromixer using a Rheodyne injection valve for introducing discrete sample pulses into the miniaturised-SYNthesis and Total Analysis System (πSYNTAS).
Purify the salt by recrystallisation from EtOH/Et2O, MeCN or Me2CO/MeOH. The free base has m 37-39o (after sublimation), b 102-105o/18mm, and the hydrate has m 56-58o (wet Et2O); the hydrobromide has m 203o (from EtOH/Et2O), and the picrate has m 196o (from aqueous EtOH). [Sandris & Ourisson Bull Soc Chim Fr 345 1958, Beilstein 21 H 246, 21 I 273, 21 II 222, 21 III/IV 3278, 21/6 V 538.]
