(+/-)-8-ethoxycarbonyl-2-methyl-3-methylene-1-oxa-8-azaspiro<4,5>decane | 168296-14-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 氮杂螺癸烷衍生物
• 英文名称: (+/-)-8-ethoxycarbonyl-2-methyl-3-methylene-1-oxa-8-azaspiro<4,5>decane
• 英文别名: Ethyl 2-methyl-3-methylidene-1-oxa-8-azaspiro[4.5]decane-8-carboxylate
• CAS: 168296-14-8
• 化学式: C₁₃H₂₁NO₃
• 分子量: 239.315
• InChiKey: CLDDNIKTHFKFGH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.4
• 重原子数：
  17
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.77
• 拓扑面积：
  38.8
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (+/-)-8-ethoxycarbonyl-2-methyl-3-methylene-1-oxa-8-azaspiro<4,5>decane 在 红铝 作用下， 以 四氢呋喃 为溶剂， 以0.46 g的产率得到2,8-dimethyl-3-methylene-1-oxa-8-azaspiro<4.5>decane
  参考文献：
  名称：

  Wu; Griffith; Loch III, Journal of Medicinal Chemistry, 1995, vol. 38, # 9, p. 1558 - 1570

  摘要：

  DOI：
• 作为产物：
  描述：

  (+/-)-4-bromomethyl-1-ethoxycarbonyl-4-<(1-methyl-2-propynyl)oxy>piperidine 在 sodium hydroxide 、 sodium tetrahydroborate 、 chlorocobaloxime(III) 作用下， 以 乙醇 为溶剂， 反应 0.5h， 以67%的产率得到(+/-)-8-ethoxycarbonyl-2-methyl-3-methylene-1-oxa-8-azaspiro<4,5>decane
  参考文献：
  名称：

  An Efficient Synthesis of (S)-(-)-2,8-Dimethyl-3-methylene-1-oxa-8-azaspiro[4.5]decane by Cobaloxime(I)-mediated Radical Cyclization

  摘要：

  Optically pure (S)-(-)-2,8-dimethyl-3-methylene-1-oxa-8-azaspiro[4.5]-decane (1) was synthesized by alkoxybromination of 1-ethoxycarbonyl-4-methylenepiperidine (4) with (S)-3-butyn-2-ol and N-bromosuccinimide followed by radical cyclization mediated by cobaloxime(I) in 15% overall yield. Reaction conditions for the alkoxybromination reaction were devised to reduce the requirement of the optically pure alcohol.

  DOI：

  10.3987/com-95-7113

文献信息

• Synthesis and Structure-Activity Studies of a Series of 1-Oxa-8-azaspiro(4.5)decanes as M1 Muscarinic Agonists.
  作者：Shin-ichi TSUKAMOTO、Mitsuo FUJII、Tomoyuki YASUNAGA、Koyo MATSUDA

  DOI：10.1248/cpb.43.842

  日期：——

  2, 8-Dimethyl-1-oxa-8-azaspiro[4.5]decan-3-one (17), designed by incorporating the tetrahydrofuran ring moiety of muscarone into an 8-azaspiro[4.5]decane skeleton, and related 1-oxa-8-azaspiro[4.5]decanes were synthesized and assessed as M1 muscarinic agonists for the symptomatic treatment of dementia of Alzheimer's type. The compounds were tested for central muscarinic M1 and M2 receptor affinity and in vivo muscarinic activities : namely, amelioration of scopolamine-induced impairment in rat passive avoidance tasks, and induction of hypothermia, tremor, and salivary secretion. Compound 17 exhibited potent muscarinic activities in vitro and in vivo with no selectivity. Systematic modifications of 17 were conducted, and a number of compounds, including the 2-ethyl analogue (18), 3-methylene analogue (29), 3-dithioketal analogues (26, 28), and 3-oxime analogue (37) were found to display preferential affinity for M1 receptors over M2 receptors and, in addition, to exhibit potent antiamnesic activity sufficiently separated from hypothermia-inducing activity, taken as an index of cholinergic side effects, compared with the reference compound RS86 (1). Structure-activity relationships are discussed in comparison with those for muscarone analogues. Of these compounds only two, 2-ethyl-8-methyl-1-oxa-8-azaspiro[4.5]decan-3-one (18) and 2, 8-dimethyl-3-methylene-1-oxa-8-azaspiro[4.5]decane (29), stimulated phosphoinositide hydrolysis in rat hippocampal slices, indicating partial agonistic activity for M1 muscarinic receptors.The optical resolution of 18 and 29 was performed. Eudismic ratios of both compounds in binding affinity were low, but M1 agonist activity resided preferentially in the (-)-isomers. The absolute configuration of (-)-29 was determined by X-ray crystal structure analysis to be S, being the same as that of muscarone. Based on the in vivo selectivity, (-)-29 was selected for clinical studies.

  2, 8-Dimethyl-1-oxa-8-azaspiro[4.5]decan-3-one (17)，通过将muscarone的四氢呋喃环部分合并到8-azaspiro[4.5]decane骨架中而设计，以及相关的1-oxa合成了-8-氮杂螺[4.5]癸烷并评估其作为M1毒蕈碱激动剂对阿尔茨海默氏型痴呆的对症治疗。测试了这些化合物的中枢毒蕈碱 M1 和 M2 受体亲和力和体内毒蕈碱活性：即改善东莨菪碱诱导的大鼠被动回避任务损伤，以及诱导体温过低、震颤和唾液分泌。化合物17在体外和体内表现出有效的毒蕈碱活性，且无选择性。对 17 个化合物进行了系统修饰，得到了许多化合物，包括 2-乙基类似物 (18)、3-亚甲基类似物 (29)、3-二硫缩酮类似物 (26, 28) 和 3-肟类似物 (37)。发现与 M2 受体相比，对 M1 受体表现出优先的亲和力，此外，与参考化合物 RS86 相比，还表现出与低温诱导活性充分分离的有效抗遗忘活性（作为胆碱能副作用的指标）(1)。讨论了结构-活性关系，并与麝香酮类似物的结构-活性关系进行比较。这些化合物中只有两种，2-乙基-8-甲基-1-氧杂-8-氮杂螺[4.5]癸-3-酮(18)和2, 8-二甲基-3-亚甲基-1-氧杂-8-氮杂螺[4.5]癸烷(29)，刺激大鼠海马切片中的磷酸肌醇水解，表明对M1毒蕈碱受体具有部分激动活性。进行18和29的光学分辨率。两种化合物的结合亲和力的平均比率较低，但 M1 激动剂活性优先存在于 (-)-异构体中。 X射线晶体结构分析确定(-)-29的绝对构型为S，与麝香酮相同。基于体内选择性，选择(-)-29进行临床研究。
• Wu; Griffith; Loch III, Journal of Medicinal Chemistry, 1995, vol. 38, # 9, p. 1558 - 1570
  作者：Wu、Griffith、Loch III、Kover、Murray、Mullen、Blosser、Machulskis、McCreedy

  DOI：——

  日期：——
• An Efficient Synthesis of (S)-(-)-2,8-Dimethyl-3-methylene-1-oxa-8-azaspiro[4.5]decane by Cobaloxime(I)-mediated Radical Cyclization
  作者：Shin-ichi Tsukamoto、Yutaka Kondo、Susumu Igarashi

  DOI：10.3987/com-95-7113

  日期：——

  Optically pure (S)-(-)-2,8-dimethyl-3-methylene-1-oxa-8-azaspiro[4.5]-decane (1) was synthesized by alkoxybromination of 1-ethoxycarbonyl-4-methylenepiperidine (4) with (S)-3-butyn-2-ol and N-bromosuccinimide followed by radical cyclization mediated by cobaloxime(I) in 15% overall yield. Reaction conditions for the alkoxybromination reaction were devised to reduce the requirement of the optically pure alcohol.