Table 3. Scope for the synthesis of 4-chloropiperidines.a.
3 (0.2 mmol), HCl DMPU (2.4 equiv), DMSO (2.4 equiv), 65 °C, 9–18 h, isolated yields, b 1H NMR with CH2Br2 as internal standard.
3 (0.2 mmol), HCl DMPU (2.4 equiv), DMSO (2.4 equiv), 65 °C, 9–18 h, isolated yields, b 1H NMR with CH2Br2 as internal standard.