HUPERZINE-TACRINE HYBRIDS AND PROCESS FOR PREPARING THEM

摘要

Huperzine-tacrine hybrids and preparing process thereof is provided to improve inhibiting activity of acetylcholine esterase(AChE) associated with occurrence of neurodegenerative disease, and enhance their production yield. The huperzine-tacrine hybrid derivatives represented by the formula(1) having neurodegenerative disease-treating effect are provided, wherein X is hydrogen, halogen group or C1-C6 alkyl group, m is 1 to 3 and n is 1 or 2; and the neurodegenerative disease is dementia. The precursors of the huperzine-tacrine hybrid derivatives represented by the formula(6) are provided. The process for preparing the huperzine-tacrine hybrid derivatives comprises the steps of: (1) treating chloro acrydine represented by the formula(2) with hydroxylamine to prepare hydroxy compounds represented by the formula(3); (2) oxidizing the compounds of the formula(3) with an oxidizing agent selected from pyridinium chlorochromate(PCC), pyridinium dichromate(PDC), Jone's reagent and manganese dioxide to prepare aldehyde compounds represented by the formula(4); (3) condensing the aldehyde compounds of the formula(4) with pyridineamine represented by the formula(5) by using a molecular sieve to prepare immine, and reducing it to prepare compounds represented by the formula(6); and (4) deprotecting the compounds of the formula(6) by using trimethylsilyl iodide(TMSI).