Litebamine N-Homologues: Preparation and Anti-Acetylcholinesterase Activity
摘要:
Litebamine N-homologues were easily prepared from laurolitsine, generally via three reaction steps (N-alkylation, solvolysis with 1 M NH4OAc under reflux, and the Mannich reaction) in more than 80% overall yield. Among the prepared compounds, N-propyl-, N-isobutyl-, and N-isopropylnorlitebamines exhibited moderate antiacetylcholinesterase activity (IC50 Ca 7.0 mu M), while the corresponding N-metho salt of N-propylnorlitebamine showed potent activity (IC50 2.70 mu M).
Phenanthrene alkaloids was semisynthesized fromN-alkyllaurolitsines such as boldine directly from solvolysis with 1M ammonium acetate under reflux overnight. This one step reaction is easily workup and the yield is high (> 80%).
Litebamine <i>N</i>-Homologues: Preparation and Anti-Acetylcholinesterase Activity
作者:Chi-Ming Chiou、Jaw-Jou Kang、Shoei-Sheng Lee
DOI:10.1021/np970298f
日期:1998.1.1
Litebamine N-homologues were easily prepared from laurolitsine, generally via three reaction steps (N-alkylation, solvolysis with 1 M NH4OAc under reflux, and the Mannich reaction) in more than 80% overall yield. Among the prepared compounds, N-propyl-, N-isobutyl-, and N-isopropylnorlitebamines exhibited moderate antiacetylcholinesterase activity (IC50 Ca 7.0 mu M), while the corresponding N-metho salt of N-propylnorlitebamine showed potent activity (IC50 2.70 mu M).