Studies on psychotropic agents. I. Synthesis of 3,8-disubstituted-1-oxa-3,8-diazaspiro(4,5)decan-2,4-dione derivatives.
作者:YASUTAKA NAGAI、AKIO MAKI、HISASHI KANDA、KAGAYAKI NATSUKA、SUSUMU UMEMOTO
DOI:10.1248/cpb.24.1179
日期:——
A series of 3, 8-disubstituted-1-oxa-3, 8-diazaspiro [4, 5] decan-2, 4-diones (XI) were synthesized for pharmacological testing. 3-Substituted-8-benzyl compounds (IIIb-h), the intermediates of XI, were prepared by the following three methods : 1) condensation of methyl 1-benzyl-4-hydroxyisonipecotate (II) with urea, followed by alkylation, 2) treatment of II with isocyanates and 3) reaction of 1-benzyl-4-cyano-4-piperidinol (I) with isocyanates followed by hydrolysis. The last method was inferior to the other two methods. Reductive debenzylation of III followed by condensation with appropriate halides afforded XI. Among the compounds (XI) synthesized, 8-[3-(2-chlorophenothiazin-10-yl) propyl]-3-methyl compound (XIa) had excellent central nervous system depressing activities.
为了进行药理测试,合成了一系列3,8-二取代-1-氧杂-3,8-二氮杂螺[4,5]癸烷-2,4-二酮(XI)。3-取代-8-苄基化合物(IIIb-h)是XI的中间体,通过以下三种方法制备:
1) 甲基1-苄基-4-羟基异哌啶酸酯(II)与尿素缩合,随后进行烷基化
2) 将II与异氰酸酯反应
3) 1-苄基-4-氰基-4-哌啶醇(I)与异氰酸酯反应,然后水解
最后一种方法不如前两种方法。III脱苄基还原后与适当的卤化物缩合得到XI。在合成的化合物(XI)中,8-[3-(2-氯吩噻嗪-10-基)丙基]-3-甲基化合物(XIa)具有优异的中枢神经系统抑制活性。