Synthesis and Structure-Activity Studies of a Series of 1-Oxa-2,8-diazaspiro(4.5)decan-3-ones and Related Compounds as M1 Muscarinic Agonists.
作者:Shin-ichi TSUKAMOTO、Hitoshi NAGAOKA、Susumu IGARASHI、Fumikazu WANIBUCHI、Kazuyuki HIDAKA、Toshinari TAMURA
DOI:10.1248/cpb.43.1523
日期:——
A series of novel 2,8-dialkyl-1-oxa-2,8-diazaspiro[4.5]decan-3-ones and 2,8-dimethyl-1,2,8-triazaspiro[4.5]-decan-3-one (13), related to M1 muscarinic agonists YM796 and RS86, were synthesized by using Michael addition reaction of hydroxyurea or methylhydrazine to alpha, beta-unsaturated esters followed by cyclization reaction. These compounds were assessed for binding affinities for M1 and M2 receptors
一系列新颖的2,8-二烷基-1-氧杂-2,8-二氮杂螺[4.5] decan-3-one和2,8-二甲基-1,2,8-三氮杂螺[4.5] -decan-3-one (13)与M1毒蕈碱激动剂YM796和RS86有关,是通过羟基脲或甲基肼与α,β-不饱和酯的迈克尔加成反应,然后环化反应合成的。评估了这些化合物对M1和M2受体的结合亲和力和体内毒蕈碱活性:即减轻东passive碱引起的大鼠被动回避任务中的损伤以及诱导体温过低,震颤和流涎。2,8-二甲基-1-恶唑-2,8-二氮杂螺[4.5]十烷-3-酮(6a)对M1和M2受体均表现出高亲和力,显示出健忘活性(0.1 mg / kg,sc)并诱发体温过低(3 mg / kg,sc)。此外,6a刺激大鼠海马切片中的磷酸肌醇水解,表明对M1毒蕈碱受体有部分激动作用。N在6a的N2处甲基的改变增加了M1相对于M2受体的结合亲和力的选择性,但导致M1激动