RESUMEN
6-Bromo-3-n-butylphthalide was obtained by nitration, reduction and diazotization from carboxybenzaldehyde. Twenty hybrids from substituted styrene and 6-bromo-3-n-butylphthalide were synthesized and the structure was confirmed by 1H NMR, 13C NMR and ESI-MS. All compounds were evaluated for neuroprotective activity against OGD/R-induced neurotoxicity in rat cortical neurons by MTT assay. The mechanism of neuroprotection was investigated by Western blot analyses. The results indicated that most of these compounds had a potent neuroprotective activity (All animal experiments were approved by the Experimental Animal Ethics Committee of Anhui University of Chinese Medicine), especially 10h and 10i showed significant effects, which may play a neuroprotective role by activating the PI3K/Akt signaling pathway.